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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 41 |
| 3 | 22974 |
| 4 | 6794579902621097 |
| 5 | 13653726962325414829845747247532682721242051 |
[2,3,41,22974,6794579902621097, 13653726962325414829845747247532682721242051] |