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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -4 |
| 2 | 112 |
| 3 | -7744 |
| 4 | 995840 |
| 5 | -205558144 |
| 6 | 62203595776 |
| 7 | -25948859891712 |
| 8 | 14273513699311616 |
| 9 | -10010170584339742720 |
| 10 | 8717845696617764192256 |
| 11 | -9230668213290446763196416 |
| 12 | 11677592409577212192402440192 |
[1,-4,112,-7744,995840,-205558144,62203595776, -25948859891712,14273513699311616, -10010170584339742720,8717845696617764192256, -9230668213290446763196416, 11677592409577212192402440192] |