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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 93 |
| 4 | 1618 |
| 5 | 45287 |
| 6 | 1870946 |
| 7 | 114730926 |
| 8 | 10637570858 |
| 9 | 1496868608807 |
[1,8,93,1618,45287,1870946,114730926,10637570858, 1496868608807] |