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| n | a(n) |
|---|---|
| 0 | 5040 |
| 1 | -4137840 |
| 2 | 99515142720 |
| 3 | -1122871063189680 |
| 4 | 9688118420572305840 |
| 5 | -150299359081533202947840 |
| 6 | 1405831144255746621131643120 |
| 7 | -18442639987146150894175704882480 |
| 8 | 203561673763315319923663885655833920 |
[5040,-4137840,99515142720,-1122871063189680, 9688118420572305840,-150299359081533202947840, 1405831144255746621131643120, -18442639987146150894175704882480, 203561673763315319923663885655833920] |