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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | -32 |
| 3 | 800 |
| 4 | -35840 |
| 5 | 2508800 |
| 6 | -246579200 |
| 7 | 32614400000 |
| 8 | -5594021888000 |
| 9 | 1206137913344000 |
| 10 | -319343506227200000 |
| 11 | 101868334198292480000 |
| 12 | -38531929483929190400000 |
| 13 | 17052425131124169113600000 |
| 14 | -8729129668569923688857600000 |
| 15 | 5117793695169522496962560000000 |
[2,-32,800,-35840,2508800,-246579200,32614400000, -5594021888000,1206137913344000, -319343506227200000,101868334198292480000, -38531929483929190400000, 17052425131124169113600000, -8729129668569923688857600000, 5117793695169522496962560000000] |