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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 966721 |
| 4 | 76793344 |
| 5 | 5725140970 |
| 6 | 105562511360 |
| 7 | 2041422379715 |
| 8 | 18916515762176 |
| 9 | 172418925319284 |
| 10 | 1044180815600640 |
| 11 | 6210623507283525 |
| 12 | 27500897986132480 |
| 13 | 122853171969762526 |
| 14 | 443230405603523584 |
[0,0,966721,76793344,5725140970,105562511360, 2041422379715,18916515762176,172418925319284, 1044180815600640,6210623507283525, 27500897986132480,122853171969762526, 443230405603523584] |