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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1536 |
| 2 | 551808 |
| 3 | 163854336 |
| 4 | -93387735168 |
| 5 | -9709554816000 |
| 6 | 4142226444876288 |
| 7 | 642510156233453568 |
| 8 | 41792421673548259200 |
| 9 | 1615606968766288470528 |
| 10 | 42343208407470359036160 |
| 11 | 812663841518551604717568 |
| 12 | 12060089370317565140003328 |
[1,-1536,551808,163854336,-93387735168, -9709554816000,4142226444876288, 642510156233453568,41792421673548259200, 1615606968766288470528,42343208407470359036160, 812663841518551604717568, 12060089370317565140003328] |