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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 4032 |
| 3 | 1612800 |
| 4 | 631427328 |
| 5 | 246562692200 |
| 6 | 96244833484800 |
| 7 | 37566939748080392 |
| 8 | 14663279200231130112 |
| 9 | 5723424260979717196800 |
| 10 | 2233987356983360324068800 |
| 11 | 871977888467614764819315368 |
| 12 | 340353508793721676084268236800 |
| 13 | 132847991246505889127220947758952 |
[8,4032,1612800,631427328,246562692200, 96244833484800,37566939748080392, 14663279200231130112,5723424260979717196800, 2233987356983360324068800, 871977888467614764819315368, 340353508793721676084268236800, 132847991246505889127220947758952] |