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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 3279 |
| 3 | 423141 |
| 4 | 199339608 |
| 5 | 310310891535 |
| 6 | 1673449182032706 |
| 7 | 29011762459538515234 |
| 8 | 1740561875727381912400072 |
| 9 | 337008848853576488534585345308 |
[81,3279,423141,199339608,310310891535, 1673449182032706,29011762459538515234, 1740561875727381912400072, 337008848853576488534585345308] |