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| n | a(n) |
|---|---|
| 1 | -240 |
| 2 | 53280 |
| 3 | -12288960 |
| 4 | 2835808320 |
| 5 | -654403831200 |
| 6 | 151013228757120 |
| 7 | -34848505552897920 |
| 8 | 8041801037378486400 |
| 9 | -1855762905734676483120 |
| 10 | 428244362959801779806400 |
| 11 | -98823634118413525094402880 |
| 12 | 22804995243537595828606337280 |
[-240,53280,-12288960,2835808320,-654403831200, 151013228757120,-34848505552897920, 8041801037378486400,-1855762905734676483120, 428244362959801779806400, -98823634118413525094402880, 22804995243537595828606337280] |