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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -4 |
| 3 | -109 |
| 4 | 13436 |
| 5 | 8425506 |
| 6 | -26312994024 |
| 7 | -411193252871529 |
| 8 | 32123650782112689116 |
| 9 | 12548365338592689141400286 |
| 10 | -24508500955561451477156078353144 |
[1,1,-4,-109,13436,8425506,-26312994024, -411193252871529,32123650782112689116, 12548365338592689141400286, -24508500955561451477156078353144] |