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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 22794 |
| 4 | 7559559 |
| 5 | 317938418 |
| 6 | 5505577418 |
| 7 | 51259291732 |
| 8 | 347529017647 |
[0,3,22794,7559559,317938418,5505577418, 51259291732,347529017647] |