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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 7313 |
| 3 | 1782191 |
| 4 | 1827047303 |
| 5 | 7626209039519 |
| 6 | 162241662044855141 |
[81,7313,1782191,1827047303,7626209039519, 162241662044855141] |