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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 162 |
| 4 | 15336 |
| 5 | 5135400 |
| 6 | 6403850928 |
| 7 | 30733361357328 |
| 8 | 576178771105452672 |
| 9 | 42495458789243292762240 |
| 10 | 12378928091101498820594407680 |
| 11 | 14278666564505879853034906179788544 |
[1,6,162,15336,5135400,6403850928,30733361357328, 576178771105452672,42495458789243292762240, 12378928091101498820594407680, 14278666564505879853034906179788544] |