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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 2471 |
| 3 | 203517 |
| 4 | 55635639 |
| 5 | 48557573047 |
| 6 | 149399847864279 |
| 7 | 1491726036815254275 |
| 8 | 48504233592897621172359 |
[81,2471,203517,55635639,48557573047, 149399847864279,1491726036815254275, 48504233592897621172359] |