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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 17 |
| 7 | 324 |
| 8 | 842227 |
| 9 | 57810418543 |
| 10 | 104452188344901572 |
| 11 | 6108088657705958932053657 |
[1,1,1,2,2,17,324,842227,57810418543, 104452188344901572,6108088657705958932053657] |