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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 27 |
| 3 | 2025 |
| 4 | 421875 |
| 5 | 288507825 |
| 6 | 622332801675 |
| 7 | 4468456626780825 |
| 8 | 104443823338086658275 |
| 9 | 8163685522687864520397825 |
| 10 | 2101858460730043160691131026875 |
[1,27,2025,421875,288507825,622332801675, 4468456626780825,104443823338086658275, 8163685522687864520397825, 2101858460730043160691131026875] |