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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 25 |
| 4 | 314 |
| 5 | 7363 |
| 6 | 350711 |
| 7 | 33176391 |
| 8 | 6258308430 |
| 9 | 2359068239358 |
| 10 | 1774609159901861 |
[1,5,25,314,7363,350711,33176391,6258308430, 2359068239358,1774609159901861] |