The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 10 |
| 5 | 15 |
| 6 | 21 |
| 7 | 28 |
| 8 | 36 |
| 9 | 45 |
| 10 | 55 |
| 11 | 66 |
| 12 | 77 |
| 13 | 90 |
| 14 | 104 |
| 15 | 119 |
| 16 | 134 |
| 17 | 151 |
| 18 | 169 |
| 19 | 188 |
| 20 | 208 |
| 21 | 229 |
| 22 | 251 |
| 23 | 274 |
| 24 | 297 |
| 25 | 322 |
| 26 | 348 |
| 27 | 374 |
| 28 | 402 |
| 29 | 431 |
| 30 | 461 |
| 31 | 492 |
| 32 | 523 |
| 33 | 556 |
| 34 | 588 |
| 35 | 623 |
| 36 | 658 |
| 37 | 695 |
| 38 | 733 |
| 39 | 771 |
| 40 | 810 |
| 41 | 851 |
| 42 | 893 |
| 43 | 936 |
| 44 | 980 |
| 45 | 1025 |
| 46 | 1071 |
| 47 | 1118 |
| 48 | 1164 |
| 49 | 1213 |
| 50 | 1263 |
| 51 | 1313 |
| 52 | 1365 |
| 53 | 1417 |
[1,3,6,10,15,21,28,36,45,55,66,77,90,104,119,134, 151,169,188,208,229,251,274,297,322,348,374,402, 431,461,492,523,556,588,623,658,695,733,771,810, 851,893,936,980,1025,1071,1118,1164,1213,1263, 1313,1365,1417] |