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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 17 |
| 4 | 92 |
| 5 | 996 |
| 6 | 24896 |
| 7 | 920636 |
| 8 | 71124412 |
| 9 | 9968165333 |
| 10 | 2577755289185 |
[1,5,17,92,996,24896,920636,71124412,9968165333, 2577755289185] |