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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 520783 |
| 4 | 1777232132705889910073 |
| 5 | 1989655738014873996462170980393276816167557169374094238588991602837393 |
[1,1,11,520783,1777232132705889910073, 19896557380148739964621709803932768161675571693740\ 94238588991602837393] |