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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 2401 |
| 3 | 62001 |
| 4 | 1560001 |
| 5 | 351600001 |
| 6 | 47852000001 |
| 7 | 610350000001 |
| 8 | 586547900000001 |
| 9 | 5508423000000001 |
| 10 | 2032852170000000001 |
| 11 | 184259414700000000001 |
| 12 | 26756525040000000000001 |
| 13 | 26756525040000000000001 |
[81,2401,62001,1560001,351600001,47852000001, 610350000001,586547900000001,5508423000000001, 2032852170000000001,184259414700000000001, 26756525040000000000001,26756525040000000000001] |