# List of Partial Sums of Natural Numbers up to 1,000

For your convenience, I created a list of partial sums of natural numbers from 1 to 1,000. So, S(1) = first partial sum, S(2) = second partial sum, S(3) = third partial sum, S(4) = fourth partial sum, and so on.

You can use this list as an answer key to practice finding the sum of the first $\large\color{red}n$ natural numbers using the arithmetic series formula.

$S (1) = 1$
$S (2) = 3$
$S (3) = 6$
$S (4) = 10$
$S (5) = 15$
$S (6) = 21$
$S (7) = 28$
$S (8) = 36$
$S (9) = 45$
$S (10) = 55$
$S (11) = 66$
$S (12) = 78$
$S (13) = 91$
$S (14) = 105$
$S (15) = 120$
$S (16) = 136$
$S (17) = 153$
$S (18) = 171$
$S (19) = 190$
$S (20) = 210$
$S (21) = 231$
$S (22) = 253$
$S (23) = 276$
$S (24) = 300$
$S (25) = 325$
$S (26) = 351$
$S (27) = 378$
$S (28) = 406$
$S (29) = 435$
$S (30) = 465$
$S (31) = 496$
$S (32) = 528$
$S (33) = 561$
$S (34) = 595$
$S (35) = 630$
$S (36) = 666$
$S (37) = 703$
$S (38) = 741$
$S (39) = 780$
$S (40) = 820$
$S (41) = 861$
$S (42) = 903$
$S (43) = 946$
$S (44) = 990$
$S (45) = 1035$
$S (46) = 1081$
$S (47) = 1128$
$S (48) = 1176$
$S (49) = 1225$
$S (50) = 1275$
$S (51) = 1326$
$S (52) = 1378$
$S (53) = 1431$
$S (54) = 1485$
$S (55) = 1540$
$S (56) = 1596$
$S (57) = 1653$
$S (58) = 1711$
$S (59) = 1770$
$S (60) = 1830$
$S (61) = 1891$
$S (62) = 1953$
$S (63) = 2016$
$S (64) = 2080$
$S (65) = 2145$
$S (66) = 2211$
$S (67) = 2278$
$S (68) = 2346$
$S (69) = 2415$
$S (70) = 2485$
$S (71) = 2556$
$S (72) = 2628$
$S (73) = 2701$
$S (74) = 2775$
$S (75) = 2850$
$S (76) = 2926$
$S (77) = 3003$
$S (78) = 3081$
$S (79) = 3160$
$S (80) = 3240$
$S (81) = 3321$
$S (82) = 3403$
$S (83) = 3486$
$S (84) = 3570$
$S (85) = 3655$
$S (86) = 3741$
$S (87) = 3828$
$S (88) = 3916$
$S (89) = 4005$
$S (90) = 4095$
$S (91) = 4186$
$S (92) = 4278$
$S (93) = 4371$
$S (94) = 4465$
$S (95) = 4560$
$S (96) = 4656$
$S (97) = 4753$
$S (98) = 4851$
$S (99) = 4950$
$S (100) = 5050$
$S (101) = 5151$
$S (102) = 5253$
$S (103) = 5356$
$S (104) = 5460$
$S (105) = 5565$
$S (106) = 5671$
$S (107) = 5778$
$S (108) = 5886$
$S (109) = 5995$
$S (110) = 6105$
$S (111) = 6216$
$S (112) = 6328$
$S (113) = 6441$
$S (114) = 6555$
$S (115) = 6670$
$S (116) = 6786$
$S (117) = 6903$
$S (118) = 7021$
$S (119) = 7140$
$S (120) = 7260$
$S (121) = 7381$
$S (122) = 7503$
$S (123) = 7626$
$S (124) = 7750$
$S (125) = 7875$
$S (126) = 8001$
$S (127) = 8128$
$S (128) = 8256$
$S (129) = 8385$
$S (130) = 8515$
$S (131) = 8646$
$S (132) = 8778$
$S (133) = 8911$
$S (134) = 9045$
$S (135) = 9180$
$S (136) = 9316$
$S (137) = 9453$
$S (138) = 9591$
$S (139) = 9730$
$S (140) = 9870$
$S (141) = 10011$
$S (142) = 10153$
$S (143) = 10296$
$S (144) = 10440$
$S (145) = 10585$
$S (146) = 10731$
$S (147) = 10878$
$S (148) = 11026$
$S (149) = 11175$
$S (150) = 11325$
$S (151) = 11476$
$S (152) = 11628$
$S (153) = 11781$
$S (154) = 11935$
$S (155) = 12090$
$S (156) = 12246$
$S (157) = 12403$
$S (158) = 12561$
$S (159) = 12720$
$S (160) = 12880$
$S (161) = 13041$
$S (162) = 13203$
$S (163) = 13366$
$S (164) = 13530$
$S (165) = 13695$
$S (166) = 13861$
$S (167) = 14028$
$S (168) = 14196$
$S (169) = 14365$
$S (170) = 14535$
$S (171) = 14706$
$S (172) = 14878$
$S (173) = 15051$
$S (174) = 15225$
$S (175) = 15400$
$S (176) = 15576$
$S (177) = 15753$
$S (178) = 15931$
$S (179) = 16110$
$S (180) = 16290$
$S (181) = 16471$
$S (182) = 16653$
$S (183) = 16836$
$S (184) = 17020$
$S (185) = 17205$
$S (186) = 17391$
$S (187) = 17578$
$S (188) = 17766$
$S (189) = 17955$
$S (190) = 18145$
$S (191) = 18336$
$S (192) = 18528$
$S (193) = 18721$
$S (194) = 18915$
$S (195) = 19110$
$S (196) = 19306$
$S (197) = 19503$
$S (198) = 19701$
$S (199) = 19900$
$S (200) = 20100$
$S (201) = 20301$
$S (202) = 20503$
$S (203) = 20706$
$S (204) = 20910$
$S (205) = 21115$
$S (206) = 21321$
$S (207) = 21528$
$S (208) = 21736$
$S (209) = 21945$
$S (210) = 22155$
$S (211) = 22366$
$S (212) = 22578$
$S (213) = 22791$
$S (214) = 23005$
$S (215) = 23220$
$S (216) = 23436$
$S (217) = 23653$
$S (218) = 23871$
$S (219) = 24090$
$S (220) = 24310$
$S (221) = 24531$
$S (222) = 24753$
$S (223) = 24976$
$S (224) = 25200$
$S (225) = 25425$
$S (226) = 25651$
$S (227) = 25878$
$S (228) = 26106$
$S (229) = 26335$
$S (230) = 26565$
$S (231) = 26796$
$S (232) = 27028$
$S (233) = 27261$
$S (234) = 27495$
$S (235) = 27730$
$S (236) = 27966$
$S (237) = 28203$
$S (238) = 28441$
$S (239) = 28680$
$S (240) = 28920$
$S (241) = 29161$
$S (242) = 29403$
$S (243) = 29646$
$S (244) = 29890$
$S (245) = 30135$
$S (246) = 30381$
$S (247) = 30628$
$S (248) = 30876$
$S (249) = 31125$
$S (250) = 31375$
$S (251) = 31626$
$S (252) = 31878$
$S (253) = 32131$
$S (254) = 32385$
$S (255) = 32640$
$S (256) = 32896$
$S (257) = 33153$
$S (258) = 33411$
$S (259) = 33670$
$S (260) = 33930$
$S (261) = 34191$
$S (262) = 34453$
$S (263) = 34716$
$S (264) = 34980$
$S (265) = 35245$
$S (266) = 35511$
$S (267) = 35778$
$S (268) = 36046$
$S (269) = 36315$
$S (270) = 36585$
$S (271) = 36856$
$S (272) = 37128$
$S (273) = 37401$
$S (274) = 37675$
$S (275) = 37950$
$S (276) = 38226$
$S (277) = 38503$
$S (278) = 38781$
$S (279) = 39060$
$S (280) = 39340$
$S (281) = 39621$
$S (282) = 39903$
$S (283) = 40186$
$S (284) = 40470$
$S (285) = 40755$
$S (286) = 41041$
$S (287) = 41328$
$S (288) = 41616$
$S (289) = 41905$
$S (290) = 42195$
$S (291) = 42486$
$S (292) = 42778$
$S (293) = 43071$
$S (294) = 43365$
$S (295) = 43660$
$S (296) = 43956$
$S (297) = 44253$
$S (298) = 44551$
$S (299) = 44850$
$S (300) = 45150$
$S (301) = 45451$
$S (302) = 45753$
$S (303) = 46056$
$S (304) = 46360$
$S (305) = 46665$
$S (306) = 46971$
$S (307) = 47278$
$S (308) = 47586$
$S (309) = 47895$
$S (310) = 48205$
$S (311) = 48516$
$S (312) = 48828$
$S (313) = 49141$
$S (314) = 49455$
$S (315) = 49770$
$S (316) = 50086$
$S (317) = 50403$
$S (318) = 50721$
$S (319) = 51040$
$S (320) = 51360$
$S (321) = 51681$
$S (322) = 52003$
$S (323) = 52326$
$S (324) = 52650$
$S (325) = 52975$
$S (326) = 53301$
$S (327) = 53628$
$S (328) = 53956$
$S (329) = 54285$
$S (330) = 54615$
$S (331) = 54946$
$S (332) = 55278$
$S (333) = 55611$
$S (334) = 55945$
$S (335) = 56280$
$S (336) = 56616$
$S (337) = 56953$
$S (338) = 57291$
$S (339) = 57630$
$S (340) = 57970$
$S (341) = 58311$
$S (342) = 58653$
$S (343) = 58996$
$S (344) = 59340$
$S (345) = 59685$
$S (346) = 60031$
$S (347) = 60378$
$S (348) = 60726$
$S (349) = 61075$
$S (350) = 61425$
$S (351) = 61776$
$S (352) = 62128$
$S (353) = 62481$
$S (354) = 62835$
$S (355) = 63190$
$S (356) = 63546$
$S (357) = 63903$
$S (358) = 64261$
$S (359) = 64620$
$S (360) = 64980$
$S (361) = 65341$
$S (362) = 65703$
$S (363) = 66066$
$S (364) = 66430$
$S (365) = 66795$
$S (366) = 67161$
$S (367) = 67528$
$S (368) = 67896$
$S (369) = 68265$
$S (370) = 68635$
$S (371) = 69006$
$S (372) = 69378$
$S (373) = 69751$
$S (374) = 70125$
$S (375) = 70500$
$S (376) = 70876$
$S (377) = 71253$
$S (378) = 71631$
$S (379) = 72010$
$S (380) = 72390$
$S (381) = 72771$
$S (382) = 73153$
$S (383) = 73536$
$S (384) = 73920$
$S (385) = 74305$
$S (386) = 74691$
$S (387) = 75078$
$S (388) = 75466$
$S (389) = 75855$
$S (390) = 76245$
$S (391) = 76636$
$S (392) = 77028$
$S (393) = 77421$
$S (394) = 77815$
$S (395) = 78210$
$S (396) = 78606$
$S (397) = 79003$
$S (398) = 79401$
$S (399) = 79800$
$S (400) = 80200$
$S (401) = 80601$
$S (402) = 81003$
$S (403) = 81406$
$S (404) = 81810$
$S (405) = 82215$
$S (406) = 82621$
$S (407) = 83028$
$S (408) = 83436$
$S (409) = 83845$
$S (410) = 84255$
$S (411) = 84666$
$S (412) = 85078$
$S (413) = 85491$
$S (414) = 85905$
$S (415) = 86320$
$S (416) = 86736$
$S (417) = 87153$
$S (418) = 87571$
$S (419) = 87990$
$S (420) = 88410$
$S (421) = 88831$
$S (422) = 89253$
$S (423) = 89676$
$S (424) = 90100$
$S (425) = 90525$
$S (426) = 90951$
$S (427) = 91378$
$S (428) = 91806$
$S (429) = 92235$
$S (430) = 92665$
$S (431) = 93096$
$S (432) = 93528$
$S (433) = 93961$
$S (434) = 94395$
$S (435) = 94830$
$S (436) = 95266$
$S (437) = 95703$
$S (438) = 96141$
$S (439) = 96580$
$S (440) = 97020$
$S (441) = 97461$
$S (442) = 97903$
$S (443) = 98346$
$S (444) = 98790$
$S (445) = 99235$
$S (446) = 99681$
$S (447) = 100128$
$S (448) = 100576$
$S (449) = 101025$
$S (450) = 101475$
$S (451) = 101926$
$S (452) = 102378$
$S (453) = 102831$
$S (454) = 103285$
$S (455) = 103740$
$S (456) = 104196$
$S (457) = 104653$
$S (458) = 105111$
$S (459) = 105570$
$S (460) = 106030$
$S (461) = 106491$
$S (462) = 106953$
$S (463) = 107416$
$S (464) = 107880$
$S (465) = 108345$
$S (466) = 108811$
$S (467) = 109278$
$S (468) = 109746$
$S (469) = 110215$
$S (470) = 110685$
$S (471) = 111156$
$S (472) = 111628$
$S (473) = 112101$
$S (474) = 112575$
$S (475) = 113050$
$S (476) = 113526$
$S (477) = 114003$
$S (478) = 114481$
$S (479) = 114960$
$S (480) = 115440$
$S (481) = 115921$
$S (482) = 116403$
$S (483) = 116886$
$S (484) = 117370$
$S (485) = 117855$
$S (486) = 118341$
$S (487) = 118828$
$S (488) = 119316$
$S (489) = 119805$
$S (490) = 120295$
$S (491) = 120786$
$S (492) = 121278$
$S (493) = 121771$
$S (494) = 122265$
$S (495) = 122760$
$S (496) = 123256$
$S (497) = 123753$
$S (498) = 124251$
$S (499) = 124750$
$S (500) = 125250$
$S (501) = 125751$
$S (502) = 126253$
$S (503) = 126756$
$S (504) = 127260$
$S (505) = 127765$
$S (506) = 128271$
$S (507) = 128778$
$S (508) = 129286$
$S (509) = 129795$
$S (510) = 130305$
$S (511) = 130816$
$S (512) = 131328$
$S (513) = 131841$
$S (514) = 132355$
$S (515) = 132870$
$S (516) = 133386$
$S (517) = 133903$
$S (518) = 134421$
$S (519) = 134940$
$S (520) = 135460$
$S (521) = 135981$
$S (522) = 136503$
$S (523) = 137026$
$S (524) = 137550$
$S (525) = 138075$
$S (526) = 138601$
$S (527) = 139128$
$S (528) = 139656$
$S (529) = 140185$
$S (530) = 140715$
$S (531) = 141246$
$S (532) = 141778$
$S (533) = 142311$
$S (534) = 142845$
$S (535) = 143380$
$S (536) = 143916$
$S (537) = 144453$
$S (538) = 144991$
$S (539) = 145530$
$S (540) = 146070$
$S (541) = 146611$
$S (542) = 147153$
$S (543) = 147696$
$S (544) = 148240$
$S (545) = 148785$
$S (546) = 149331$
$S (547) = 149878$
$S (548) = 150426$
$S (549) = 150975$
$S (550) = 151525$
$S (551) = 152076$
$S (552) = 152628$
$S (553) = 153181$
$S (554) = 153735$
$S (555) = 154290$
$S (556) = 154846$
$S (557) = 155403$
$S (558) = 155961$
$S (559) = 156520$
$S (560) = 157080$
$S (561) = 157641$
$S (562) = 158203$
$S (563) = 158766$
$S (564) = 159330$
$S (565) = 159895$
$S (566) = 160461$
$S (567) = 161028$
$S (568) = 161596$
$S (569) = 162165$
$S (570) = 162735$
$S (571) = 163306$
$S (572) = 163878$
$S (573) = 164451$
$S (574) = 165025$
$S (575) = 165600$
$S (576) = 166176$
$S (577) = 166753$
$S (578) = 167331$
$S (579) = 167910$
$S (580) = 168490$
$S (581) = 169071$
$S (582) = 169653$
$S (583) = 170236$
$S (584) = 170820$
$S (585) = 171405$
$S (586) = 171991$
$S (587) = 172578$
$S (588) = 173166$
$S (589) = 173755$
$S (590) = 174345$
$S (591) = 174936$
$S (592) = 175528$
$S (593) = 176121$
$S (594) = 176715$
$S (595) = 177310$
$S (596) = 177906$
$S (597) = 178503$
$S (598) = 179101$
$S (599) = 179700$
$S (600) = 180300$
$S (601) = 180901$
$S (602) = 181503$
$S (603) = 182106$
$S (604) = 182710$
$S (605) = 183315$
$S (606) = 183921$
$S (607) = 184528$
$S (608) = 185136$
$S (609) = 185745$
$S (610) = 186355$
$S (611) = 186966$
$S (612) = 187578$
$S (613) = 188191$
$S (614) = 188805$
$S (615) = 189420$
$S (616) = 190036$
$S (617) = 190653$
$S (618) = 191271$
$S (619) = 191890$
$S (620) = 192510$
$S (621) = 193131$
$S (622) = 193753$
$S (623) = 194376$
$S (624) = 195000$
$S (625) = 195625$
$S (626) = 196251$
$S (627) = 196878$
$S (628) = 197506$
$S (629) = 198135$
$S (630) = 198765$
$S (631) = 199396$
$S (632) = 200028$
$S (633) = 200661$
$S (634) = 201295$
$S (635) = 201930$
$S (636) = 202566$
$S (637) = 203203$
$S (638) = 203841$
$S (639) = 204480$
$S (640) = 205120$
$S (641) = 205761$
$S (642) = 206403$
$S (643) = 207046$
$S (644) = 207690$
$S (645) = 208335$
$S (646) = 208981$
$S (647) = 209628$
$S (648) = 210276$
$S (649) = 210925$
$S (650) = 211575$
$S (651) = 212226$
$S (652) = 212878$
$S (653) = 213531$
$S (654) = 214185$
$S (655) = 214840$
$S (656) = 215496$
$S (657) = 216153$
$S (658) = 216811$
$S (659) = 217470$
$S (660) = 218130$
$S (661) = 218791$
$S (662) = 219453$
$S (663) = 220116$
$S (664) = 220780$
$S (665) = 221445$
$S (666) = 222111$
$S (667) = 222778$
$S (668) = 223446$
$S (669) = 224115$
$S (670) = 224785$
$S (671) = 225456$
$S (672) = 226128$
$S (673) = 226801$
$S (674) = 227475$
$S (675) = 228150$
$S (676) = 228826$
$S (677) = 229503$
$S (678) = 230181$
$S (679) = 230860$
$S (680) = 231540$
$S (681) = 232221$
$S (682) = 232903$
$S (683) = 233586$
$S (684) = 234270$
$S (685) = 234955$
$S (686) = 235641$
$S (687) = 236328$
$S (688) = 237016$
$S (689) = 237705$
$S (690) = 238395$
$S (691) = 239086$
$S (692) = 239778$
$S (693) = 240471$
$S (694) = 241165$
$S (695) = 241860$
$S (696) = 242556$
$S (697) = 243253$
$S (698) = 243951$
$S (699) = 244650$
$S (700) = 245350$
$S (701) = 246051$
$S (702) = 246753$
$S (703) = 247456$
$S (704) = 248160$
$S (705) = 248865$
$S (706) = 249571$
$S (707) = 250278$
$S (708) = 250986$
$S (709) = 251695$
$S (710) = 252405$
$S (711) = 253116$
$S (712) = 253828$
$S (713) = 254541$
$S (714) = 255255$
$S (715) = 255970$
$S (716) = 256686$
$S (717) = 257403$
$S (718) = 258121$
$S (719) = 258840$
$S (720) = 259560$
$S (721) = 260281$
$S (722) = 261003$
$S (723) = 261726$
$S (724) = 262450$
$S (725) = 263175$
$S (726) = 263901$
$S (727) = 264628$
$S (728) = 265356$
$S (729) = 266085$
$S (730) = 266815$
$S (731) = 267546$
$S (732) = 268278$
$S (733) = 269011$
$S (734) = 269745$
$S (735) = 270480$
$S (736) = 271216$
$S (737) = 271953$
$S (738) = 272691$
$S (739) = 273430$
$S (740) = 274170$
$S (741) = 274911$
$S (742) = 275653$
$S (743) = 276396$
$S (744) = 277140$
$S (745) = 277885$
$S (746) = 278631$
$S (747) = 279378$
$S (748) = 280126$
$S (749) = 280875$
$S (750) = 281625$
$S (751) = 282376$
$S (752) = 283128$
$S (753) = 283881$
$S (754) = 284635$
$S (755) = 285390$
$S (756) = 286146$
$S (757) = 286903$
$S (758) = 287661$
$S (759) = 288420$
$S (760) = 289180$
$S (761) = 289941$
$S (762) = 290703$
$S (763) = 291466$
$S (764) = 292230$
$S (765) = 292995$
$S (766) = 293761$
$S (767) = 294528$
$S (768) = 295296$
$S (769) = 296065$
$S (770) = 296835$
$S (771) = 297606$
$S (772) = 298378$
$S (773) = 299151$
$S (774) = 299925$
$S (775) = 300700$
$S (776) = 301476$
$S (777) = 302253$
$S (778) = 303031$
$S (779) = 303810$
$S (780) = 304590$
$S (781) = 305371$
$S (782) = 306153$
$S (783) = 306936$
$S (784) = 307720$
$S (785) = 308505$
$S (786) = 309291$
$S (787) = 310078$
$S (788) = 310866$
$S (789) = 311655$
$S (790) = 312445$
$S (791) = 313236$
$S (792) = 314028$
$S (793) = 314821$
$S (794) = 315615$
$S (795) = 316410$
$S (796) = 317206$
$S (797) = 318003$
$S (798) = 318801$
$S (799) = 319600$
$S (800) = 320400$
$S (801) = 321201$
$S (802) = 322003$
$S (803) = 322806$
$S (804) = 323610$
$S (805) = 324415$
$S (806) = 325221$
$S (807) = 326028$
$S (808) = 326836$
$S (809) = 327645$
$S (810) = 328455$
$S (811) = 329266$
$S (812) = 330078$
$S (813) = 330891$
$S (814) = 331705$
$S (815) = 332520$
$S (816) = 333336$
$S (817) = 334153$
$S (818) = 334971$
$S (819) = 335790$
$S (820) = 336610$
$S (821) = 337431$
$S (822) = 338253$
$S (823) = 339076$
$S (824) = 339900$
$S (825) = 340725$
$S (826) = 341551$
$S (827) = 342378$
$S (828) = 343206$
$S (829) = 344035$
$S (830) = 344865$
$S (831) = 345696$
$S (832) = 346528$
$S (833) = 347361$
$S (834) = 348195$
$S (835) = 349030$
$S (836) = 349866$
$S (837) = 350703$
$S (838) = 351541$
$S (839) = 352380$
$S (840) = 353220$
$S (841) = 354061$
$S (842) = 354903$
$S (843) = 355746$
$S (844) = 356590$
$S (845) = 357435$
$S (846) = 358281$
$S (847) = 359128$
$S (848) = 359976$
$S (849) = 360825$
$S (850) = 361675$
$S (851) = 362526$
$S (852) = 363378$
$S (853) = 364231$
$S (854) = 365085$
$S (855) = 365940$
$S (856) = 366796$
$S (857) = 367653$
$S (858) = 368511$
$S (859) = 369370$
$S (860) = 370230$
$S (861) = 371091$
$S (862) = 371953$
$S (863) = 372816$
$S (864) = 373680$
$S (865) = 374545$
$S (866) = 375411$
$S (867) = 376278$
$S (868) = 377146$
$S (869) = 378015$
$S (870) = 378885$
$S (871) = 379756$
$S (872) = 380628$
$S (873) = 381501$
$S (874) = 382375$
$S (875) = 383250$
$S (876) = 384126$
$S (877) = 385003$
$S (878) = 385881$
$S (879) = 386760$
$S (880) = 387640$
$S (881) = 388521$
$S (882) = 389403$
$S (883) = 390286$
$S (884) = 391170$
$S (885) = 392055$
$S (886) = 392941$
$S (887) = 393828$
$S (888) = 394716$
$S (889) = 395605$
$S (890) = 396495$
$S (891) = 397386$
$S (892) = 398278$
$S (893) = 399171$
$S (894) = 400065$
$S (895) = 400960$
$S (896) = 401856$
$S (897) = 402753$
$S (898) = 403651$
$S (899) = 404550$
$S (900) = 405450$
$S (901) = 406351$
$S (902) = 407253$
$S (903) = 408156$
$S (904) = 409060$
$S (905) = 409965$
$S (906) = 410871$
$S (907) = 411778$
$S (908) = 412686$
$S (909) = 413595$
$S (910) = 414505$
$S (911) = 415416$
$S (912) = 416328$
$S (913) = 417241$
$S (914) = 418155$
$S (915) = 419070$
$S (916) = 419986$
$S (917) = 420903$
$S (918) = 421821$
$S (919) = 422740$
$S (920) = 423660$
$S (921) = 424581$
$S (922) = 425503$
$S (923) = 426426$
$S (924) = 427350$
$S (925) = 428275$
$S (926) = 429201$
$S (927) = 430128$
$S (928) = 431056$
$S (929) = 431985$
$S (930) = 432915$
$S (931) = 433846$
$S (932) = 434778$
$S (933) = 435711$
$S (934) = 436645$
$S (935) = 437580$
$S (936) = 438516$
$S (937) = 439453$
$S (938) = 440391$
$S (939) = 441330$
$S (940) = 442270$
$S (941) = 443211$
$S (942) = 444153$
$S (943) = 445096$
$S (944) = 446040$
$S (945) = 446985$
$S (946) = 447931$
$S (947) = 448878$
$S (948) = 449826$
$S (949) = 450775$
$S (950) = 451725$
$S (951) = 452676$
$S (952) = 453628$
$S (953) = 454581$
$S (954) = 455535$
$S (955) = 456490$
$S (956) = 457446$
$S (957) = 458403$
$S (958) = 459361$
$S (959) = 460320$
$S (960) = 461280$
$S (961) = 462241$
$S (962) = 463203$
$S (963) = 464166$
$S (964) = 465130$
$S (965) = 466095$
$S (966) = 467061$
$S (967) = 468028$
$S (968) = 468996$
$S (969) = 469965$
$S (970) = 470935$
$S (971) = 471906$
$S (972) = 472878$
$S (973) = 473851$
$S (974) = 474825$
$S (975) = 475800$
$S (976) = 476776$
$S (977) = 477753$
$S (978) = 478731$
$S (979) = 479710$
$S (980) = 480690$
$S (981) = 481671$
$S (982) = 482653$
$S (983) = 483636$
$S (984) = 484620$
$S (985) = 485605$
$S (986) = 486591$
$S (987) = 487578$
$S (988) = 488566$
$S (989) = 489555$
$S (990) = 490545$
$S (991) = 491536$
$S (992) = 492528$
$S (993) = 493521$
$S (994) = 494515$
$S (995) = 495510$
$S (996) = 496506$
$S (997) = 497503$
$S (998) = 498501$
$S (999) = 499500$
$S (1000) = 500500$