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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 172 |
| 3 | 1585108 |
| 4 | 4768417578272894 |
| 5 | 931322574615480750806365966798663150842303643 |
[8,172,1585108,4768417578272894, 931322574615480750806365966798663150842303643] |