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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 24 |
| 3 | 4995 |
| 4 | 10763361 |
| 5 | 211822552035 |
| 6 | 37523658921114744 |
| 7 | 59824832307866205347043 |
| 8 | 858420955073128584419531008641 |
| 9 | 110856622060759442496180656754310346403 |
| 10 | 128844380183002832759115461915902241562318377784 |
| 11 | 1347757724935823407809884872163997148505019182125807296675 |
[1,3,24,4995,10763361,211822552035, 37523658921114744,59824832307866205347043, 858420955073128584419531008641, 110856622060759442496180656754310346403, 128844380183002832759115461915902241562318377784, 13477577249358234078098848721639971485050191821258\ 07296675] |