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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 31 |
| 4 | 569 |
| 5 | 165211 |
| 6 | 12885396101 |
| 7 | 64563604303081738807 |
| 8 | 1361129467683753854111752846879267953905 |
| 9 | 521064401567922879406069432539095585345840013599959430520674634220747299433267 |
[1,5,31,569,165211,12885396101, 64563604303081738807, 1361129467683753854111752846879267953905, 52106440156792287940606943253909558534584001359995\ 9430520674634220747299433267] |