| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 6166 |
| 3 | 1690656 |
| 4 | 1223112064 |
| 5 | 2643367969909 |
| 6 | 16037155132964687 |
| 7 | 287962971695057053653 |
| 8 | 15262784987977280564078690 |
[81,6166,1690656,1223112064,2643367969909, 16037155132964687,287962971695057053653, 15262784987977280564078690] |