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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 972 |
| 3 | 12429 |
| 4 | 145824 |
| 5 | 2243139 |
| 6 | 39044748 |
| 7 | 964315869 |
| 8 | 27362301828 |
| 9 | 1106854279383 |
| 10 | 53489846569626 |
| 11 | 3690406822607805 |
[81,972,12429,145824,2243139,39044748,964315869, 27362301828,1106854279383,53489846569626, 3690406822607805] |