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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 997 |
| 3 | 25705 |
| 4 | 1470317 |
| 5 | 162748369 |
| 6 | 36060137413 |
| 7 | 14858103057089 |
| 8 | 12205719127343193 |
| 9 | 18568986704493659401 |
| 10 | 57651677396633858812053 |
[81,997,25705,1470317,162748369,36060137413, 14858103057089,12205719127343193, 18568986704493659401,57651677396633858812053] |