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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11 |
| 3 | 170 |
| 4 | 997 |
| 5 | 7670 |
| 6 | 62609 |
| 7 | 296063 |
| 8 | 1685893 |
| 9 | 9684421 |
| 10 | 41633825 |
[1,11,170,997,7670,62609,296063,1685893,9684421, 41633825] |