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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -6 |
| 2 | -1764 |
| 3 | -7700616 |
| 4 | -147910405104 |
| 5 | -8310698364852576 |
| 6 | -1085420895640591777344 |
| 7 | -284168646775526186095019136 |
| 8 | -134459287943928269154814258953984 |
| 9 | -106506405136317713669903020280294647296 |
[1,-6,-1764,-7700616,-147910405104, -8310698364852576,-1085420895640591777344, -284168646775526186095019136, -134459287943928269154814258953984, -106506405136317713669903020280294647296] |