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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 12 |
| 3 | 51 |
| 4 | 135 |
| 5 | 286 |
| 6 | 530 |
| 7 | 897 |
| 8 | 1421 |
| 9 | 2140 |
| 10 | 3096 |
| 11 | 4335 |
| 12 | 5907 |
| 13 | 7866 |
| 14 | 10270 |
| 15 | 13181 |
| 16 | 16665 |
| 17 | 20792 |
| 18 | 25636 |
| 19 | 31275 |
| 20 | 37791 |
| 21 | 45270 |
| 22 | 53802 |
| 23 | 63481 |
| 24 | 74405 |
| 25 | 86676 |
| 26 | 100400 |
| 27 | 115687 |
| 28 | 132651 |
| 29 | 151410 |
| 30 | 172086 |
| 31 | 194805 |
| 32 | 219697 |
| 33 | 246896 |
| 34 | 276540 |
| 35 | 308771 |
| 36 | 343735 |
| 37 | 381582 |
[0,12,51,135,286,530,897,1421,2140,3096,4335,5907, 7866,10270,13181,16665,20792,25636,31275,37791, 45270,53802,63481,74405,86676,100400,115687, 132651,151410,172086,194805,219697,246896,276540, 308771,343735,381582] |