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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 30 |
| 3 | 2284 |
| 4 | 1228712 |
| 5 | 4706484836 |
| 6 | 128150274103008 |
| 7 | 24802562025201552492 |
| 8 | 34127874973788210853920816 |
| 9 | 333813504191330813029874806441020 |
| 10 | 23211817075051890165524104293613004854364 |
[3,30,2284,1228712,4706484836,128150274103008, 24802562025201552492,34127874973788210853920816, 333813504191330813029874806441020, 23211817075051890165524104293613004854364] |