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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 1784 |
| 3 | 45987 |
| 4 | 1189428 |
| 5 | 44476077 |
| 6 | 2530095488 |
| 7 | 170968375846 |
| 8 | 12437483904432 |
| 9 | 1633760568071556 |
[81,1784,45987,1189428,44476077,2530095488, 170968375846,12437483904432,1633760568071556] |