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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 47 |
| 5 | 2207 |
| 6 | 4870843 |
| 7 | 23725111530599 |
| 8 | 562880917139361624513298747 |
| 9 | 316834926879648887020732217199607668221645859671769857 |
[2,3,7,47,2207,4870843,23725111530599, 562880917139361624513298747, 31683492687964888702073221719960766822164585967176\ 9857] |