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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 5832 |
| 5 | 1228800 |
| 6 | 384375000 |
| 7 | 153080202240 |
| 8 | 77461492681776 |
| 9 | 48745516577587200 |
| 10 | 37439062705187626320 |
| 11 | 34519165560000000000000 |
| 12 | 37661140521028611405206520 |
| 13 | 48018043198541202818460549120 |
| 14 | 70773783408692477397888505288296 |
| 15 | 119443378434420330312430518726819840 |
[0,0,0,5832,1228800,384375000,153080202240, 77461492681776,48745516577587200, 37439062705187626320,34519165560000000000000, 37661140521028611405206520, 48018043198541202818460549120, 70773783408692477397888505288296, 119443378434420330312430518726819840] |