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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 12 |
| 3 | 96 |
| 4 | 304 |
| 5 | 4416 |
| 6 | 38520 |
| 7 | 302400 |
| 8 | 3540672 |
| 9 | 39595392 |
| 10 | 461376000 |
[1,12,96,304,4416,38520,302400,3540672,39595392, 461376000] |