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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -2 |
| 3 | -48 |
| 4 | 1626 |
| 5 | 931040 |
| 6 | -479909170 |
| 7 | -5499596761127 |
| 8 | 43158334880135692 |
| 9 | 9081843551946977373216 |
| 10 | -1095541637114516172591381711 |
| 11 | -4049135740387789992460066844854898 |
| 12 | 7569951149407063102291625516677078697579 |
[1,1,-2,-48,1626,931040,-479909170,-5499596761127, 43158334880135692,9081843551946977373216, -1095541637114516172591381711, -4049135740387789992460066844854898, 7569951149407063102291625516677078697579] |