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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -12 |
| 2 | 2128 |
| 3 | 3482688 |
| 4 | -28510476032 |
| 5 | -29203453996032 |
| 6 | 18429307563035250688 |
| 7 | -709977989050867131727872 |
| 8 | -146234048852276431866584563712 |
| 9 | 20573909798214617779391304930951168 |
[1,-12,2128,3482688,-28510476032,-29203453996032, 18429307563035250688,-709977989050867131727872, -146234048852276431866584563712, 20573909798214617779391304930951168] |