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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 362 |
| 3 | 183822 |
| 4 | 243511704 |
| 5 | 666166856520 |
| 6 | 3265974496290960 |
| 7 | 26087355385405781040 |
| 8 | 317029285617274283437440 |
| 9 | 5566905178101890203492759680 |
| 10 | 135668733539484402850180633516800 |
| 11 | 4442822430221767620483566426087942400 |
| 12 | 190386370568065993499378810291075536665600 |
[1,3,362,183822,243511704,666166856520, 3265974496290960,26087355385405781040, 317029285617274283437440, 5566905178101890203492759680, 135668733539484402850180633516800, 4442822430221767620483566426087942400, 190386370568065993499378810291075536665600] |