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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 77683 |
| 4 | 657931 |
| 5 | 151628697551 |
| 6 | 154210205991661 |
| 7 | 25932657025822267968607 |
| 8 | 2913228046513104891794716413587449 |
| 9 | 396793078518930920708162576045270521 |
[1,1,77683,657931,151628697551,154210205991661, 25932657025822267968607, 2913228046513104891794716413587449, 396793078518930920708162576045270521] |