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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 704 |
| 3 | 11517 |
| 4 | 196196 |
| 5 | 3668759 |
| 6 | 66962048 |
| 7 | 1199720929 |
| 8 | 21351363302 |
| 9 | 380166026971 |
| 10 | 6777797788833 |
| 11 | 120894842412728 |
| 12 | 2156413213871354 |
| 13 | 38461828093868228 |
| 14 | 685987901327913013 |
| 15 | 12234941433232653332 |
[81,704,11517,196196,3668759,66962048,1199720929, 21351363302,380166026971,6777797788833, 120894842412728,2156413213871354, 38461828093868228,685987901327913013, 12234941433232653332] |