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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 0 |
| 4 | -8 |
| 5 | 324 |
| 6 | -530 |
| 7 | -1112688 |
| 8 | 169476046 |
| 9 | 144151873344 |
| 10 | -449531744387330 |
| 11 | -660618519039237888 |
| 12 | 83329012852592671058686 |
| 13 | -2072231651447029998880551936 |
| 14 | -1674940664087026476131857832322050 |
| 15 | 1501486075410203396595208137534328983552 |
[1,2,0,-8,324,-530,-1112688,169476046, 144151873344,-449531744387330,-660618519039237888, 83329012852592671058686, -2072231651447029998880551936, -1674940664087026476131857832322050, 1501486075410203396595208137534328983552] |