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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 1126 |
| 3 | 13750 |
| 4 | 95848 |
| 5 | 805458 |
| 6 | 5805712 |
| 7 | 46936958 |
| 8 | 297400544 |
| 9 | 2301395022 |
| 10 | 14676949336 |
| 11 | 112821800002 |
| 12 | 703842426432 |
| 13 | 5358265271090 |
| 14 | 33699329986640 |
| 15 | 255391459490526 |
| 16 | 1606272713154432 |
[81,1126,13750,95848,805458,5805712,46936958, 297400544,2301395022,14676949336,112821800002, 703842426432,5358265271090,33699329986640, 255391459490526,1606272713154432] |