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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 94 |
| 3 | 1232 |
| 4 | 17916 |
| 5 | 278088 |
| 6 | 4536836 |
| 7 | 76800064 |
| 8 | 1338190014 |
| 9 | 23861081448 |
[1,8,94,1232,17916,278088,4536836,76800064, 1338190014,23861081448] |