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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 181 |
| 5 | 594448268301656413948075911105052760867948344134387820089804440720816962 |
[1,3,4,181, 59444826830165641394807591110505276086794834413438\ 7820089804440720816962] |