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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 3363 |
| 3 | 161621 |
| 4 | 7915555 |
| 5 | 389997789 |
| 6 | 19245039957 |
| 7 | 950054488141 |
| 8 | 46905123394619 |
| 9 | 2315805078150557 |
| 10 | 114336803085406731 |
| 11 | 5645086862993222953 |
| 12 | 278711788919053258129 |
| 13 | 13760685779790427073277 |
| 14 | 679398875935060965853215 |
[81,3363,161621,7915555,389997789,19245039957, 950054488141,46905123394619,2315805078150557, 114336803085406731,5645086862993222953, 278711788919053258129,13760685779790427073277, 679398875935060965853215] |