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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 2211 |
| 3 | 168564 |
| 4 | 36874967 |
| 5 | 21755065689 |
| 6 | 36178398554012 |
| 7 | 161548363232714369 |
| 8 | 1994329748960606374641 |
[81,2211,168564,36874967,21755065689, 36178398554012,161548363232714369, 1994329748960606374641] |