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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 72 |
| 4 | 3047 |
| 5 | 265034 |
| 6 | 42442251 |
| 7 | 11193312580 |
| 8 | 4549752670983 |
| 9 | 2695786727116054 |
| 10 | 2234966723808142779 |
[1,5,72,3047,265034,42442251,11193312580, 4549752670983,2695786727116054, 2234966723808142779] |