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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 133 |
| 4 | 3389 |
| 5 | 130416 |
| 6 | 8606584 |
| 7 | 882270370 |
| 8 | 146454380449 |
| 9 | 39063673211938 |
| 10 | 16700085827135810 |
[1,8,133,3389,130416,8606584,882270370, 146454380449,39063673211938,16700085827135810] |