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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 81 |
| 3 | 12468 |
| 4 | 12218660 |
| 5 | 76964941511 |
| 6 | 3146529377348628 |
| 7 | 839863084228054288788 |
| 8 | 1460525611014150485510439164 |
[3,81,12468,12218660,76964941511,3146529377348628, 839863084228054288788, 1460525611014150485510439164] |