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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 99 |
| 6 | 1917729 |
| 7 | 695291630330558547 |
| 8 | 2868367896364283363830544991834226772439236224131 |
[1,1,1,3,99,1917729,695291630330558547, 2868367896364283363830544991834226772439236224131] |