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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1716 |
| 3 | 38760 |
| 4 | 296010 |
| 5 | 1344904 |
| 6 | 4496388 |
| 7 | 12271518 |
| 8 | 28989675 |
| 9 | 61474519 |
| 10 | 119877472 |
| 11 | 218618940 |
| 12 | 377447148 |
| 13 | 622614630 |
| 14 | 988172374 |
| 15 | 1517381580 |
| 16 | 2264243157 |
| 17 | 3295144749 |
| 18 | 4690625500 |
| 19 | 6547258432 |
| 20 | 8979650478 |
| 21 | 12122560170 |
| 22 | 16133132940 |
| 23 | 21193254160 |
| 24 | 27512019711 |
[0,1,1716,38760,296010,1344904,4496388,12271518, 28989675,61474519,119877472,218618940,377447148, 622614630,988172374,1517381580,2264243157, 3295144749,4690625500,6547258432,8979650478, 12122560170,16133132940,21193254160,27512019711] |