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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 116 |
| 4 | 15785 |
| 5 | 11599297 |
| 6 | 47212453928 |
| 7 | 1100377983366327 |
| 8 | 148568527921382084692 |
[1,5,116,15785,11599297,47212453928, 1100377983366327,148568527921382084692] |