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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 7 |
| 3 | 43 |
| 4 | 1807 |
| 5 | 3263443 |
| 6 | 10650056950807 |
| 7 | 113423713055421844361000443 |
| 8 | 12864938683278671740537145998360961546653259485195807 |
[2,3,7,43,1807,3263443,10650056950807, 113423713055421844361000443, 12864938683278671740537145998360961546653259485195\ 807] |