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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 25 |
| 3 | 1479 |
| 4 | 258581 |
| 5 | 130785357 |
| 6 | 190865489427 |
| 7 | 803986116428812 |
| 8 | 9774577782495936824 |
| 9 | 342988668346099489744721 |
| 10 | 34737069299078187196492748928 |
[2,25,1479,258581,130785357,190865489427, 803986116428812,9774577782495936824, 342988668346099489744721, 34737069299078187196492748928] |