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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -12 |
| 3 | 480 |
| 4 | -27888 |
| 5 | 2353920 |
| 6 | -274245312 |
| 7 | 41974872576 |
| 8 | -8068087373568 |
| 9 | 1860842339721216 |
| 10 | -486190504963034112 |
| 11 | 129225947748233994240 |
| 12 | -22917287813817561968640 |
| 13 | -13673939410058068058112000 |
[1,0,-12,480,-27888,2353920,-274245312, 41974872576,-8068087373568,1860842339721216, -486190504963034112,129225947748233994240, -22917287813817561968640, -13673939410058068058112000] |