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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 3 |
| 3 | 54 |
| 4 | 3861 |
| 5 | 1028700 |
| 6 | 1067510583 |
| 7 | 4390552197234 |
| 8 | 72022439672173161 |
| 9 | 4721718122762915558520 |
| 10 | 1237892818862615769794806443 |
| 11 | 1298060597552993036455274183624814 |
| 12 | 5444502293926142814638982021027945429501 |
| 13 | 91343781554550362267223855965291602454111295060 |
[1,0,3,54,3861,1028700,1067510583,4390552197234, 72022439672173161,4721718122762915558520, 1237892818862615769794806443, 1298060597552993036455274183624814, 5444502293926142814638982021027945429501, 91343781554550362267223855965291602454111295060] |