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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 768 |
| 2 | 215040 |
| 3 | 26444800 |
| 4 | 1441185792 |
| 5 | 47967398400 |
| 6 | 1138440560640 |
| 7 | 21001337579520 |
| 8 | 317833282191360 |
| 9 | 4093417325768448 |
| 10 | 46062726364262400 |
| 11 | 461921554374159360 |
| 12 | 4191623003406663680 |
| 13 | 34838889359457538560 |
| 14 | 267847934788735057920 |
[1,768,215040,26444800,1441185792,47967398400, 1138440560640,21001337579520,317833282191360, 4093417325768448,46062726364262400, 461921554374159360,4191623003406663680, 34838889359457538560,267847934788735057920] |