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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 81 |
| 3 | 81 |
| 4 | 81 |
| 5 | 2401 |
| 6 | 50625 |
| 7 | 923521 |
| 8 | 15752961 |
| 9 | 260144641 |
| 10 | 4228250625 |
| 11 | 68184176641 |
| 12 | 1095222947841 |
| 13 | 17557851463681 |
| 14 | 281200199450625 |
| 15 | 4501401006735361 |
| 16 | 72040003462430721 |
| 17 | 1152780773560811521 |
[16,81,81,81,2401,50625,923521,15752961,260144641, 4228250625,68184176641,1095222947841, 17557851463681,281200199450625,4501401006735361, 72040003462430721,1152780773560811521] |