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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 19 |
| 3 | 1446 |
| 4 | 274821 |
| 5 | 105551154 |
| 6 | 71820303857 |
| 7 | 79064800732654 |
| 8 | 131813777765106241 |
[1,19,1446,274821,105551154,71820303857, 79064800732654,131813777765106241] |