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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1948800 |
| 4 | 4619660850 |
| 5 | 1910524008960 |
| 6 | 249158110118400 |
| 7 | -46169150185843200 |
| 8 | -100137034474962893100 |
| 9 | -65217623251022392012800 |
| 10 | -20570898809667730816373760 |
| 11 | -1498883887269598785313680000 |
| 12 | 3095512575505317779623339924200 |
[1,0,0,1948800,4619660850,1910524008960, 249158110118400,-46169150185843200, -100137034474962893100,-65217623251022392012800, -20570898809667730816373760, -1498883887269598785313680000, 3095512575505317779623339924200] |