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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | -288 |
| 4 | -40192 |
| 5 | -4910720 |
| 6 | -708052992 |
| 7 | -124294481920 |
| 8 | -26387620528128 |
| 9 | -6672448330104832 |
| 10 | -1974770538516348928 |
| 11 | -671428546188604407808 |
| 12 | -256837533734311788806144 |
| 13 | -107628558926352254017470464 |
[1,2,8,-288,-40192,-4910720,-708052992, -124294481920,-26387620528128,-6672448330104832, -1974770538516348928,-671428546188604407808, -256837533734311788806144, -107628558926352254017470464] |