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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | 5 |
| 3 | 9 |
| 4 | 15 |
| 5 | 22 |
| 6 | 30 |
| 7 | 40 |
| 8 | 51 |
| 9 | 63 |
| 10 | 77 |
| 11 | 92 |
| 12 | 108 |
| 13 | 126 |
| 14 | 145 |
| 15 | 165 |
| 16 | 187 |
| 17 | 210 |
| 18 | 234 |
| 19 | 260 |
| 20 | 287 |
| 21 | 315 |
| 22 | 345 |
| 23 | 376 |
| 24 | 408 |
| 25 | 442 |
| 26 | 477 |
| 27 | 513 |
| 28 | 551 |
| 29 | 590 |
| 30 | 630 |
| 31 | 672 |
| 32 | 715 |
| 33 | 759 |
| 34 | 805 |
| 35 | 852 |
| 36 | 900 |
| 37 | 950 |
| 38 | 1001 |
| 39 | 1053 |
| 40 | 1107 |
| 41 | 1162 |
| 42 | 1218 |
| 43 | 1276 |
| 44 | 1335 |
[0,2,5,9,15,22,30,40,51,63,77,92,108,126,145,165, 187,210,234,260,287,315,345,376,408,442,477,513, 551,590,630,672,715,759,805,852,900,950,1001,1053, 1107,1162,1218,1276,1335] |