| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -6 |
| 2 | 100 |
| 3 | -5096 |
| 4 | 523920 |
| 5 | -90215136 |
| 6 | 23393880640 |
| 7 | -8507435854976 |
| 8 | 4128617538965760 |
| 9 | -2577268751229359616 |
| 10 | 2011624742314369377280 |
| 11 | -1919388801470757636909056 |
| 12 | 2197928434387448658103603200 |
[1,-6,100,-5096,523920,-90215136,23393880640, -8507435854976,4128617538965760, -2577268751229359616,2011624742314369377280, -1919388801470757636909056, 2197928434387448658103603200] |