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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 2108 |
| 3 | 107572 |
| 4 | 12331794 |
| 5 | 2926294296 |
| 6 | 1321644953390 |
| 7 | 1305716399716870 |
| 8 | 4234337234201829714 |
[81,2108,107572,12331794,2926294296,1321644953390, 1305716399716870,4234337234201829714] |