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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 31 |
| 2 | 625 |
| 3 | 10395 |
| 4 | 155001 |
| 5 | 2155251 |
| 6 | 28559665 |
| 7 | 365471515 |
| 8 | 4555708201 |
| 9 | 55646962371 |
| 10 | 668889963105 |
| 11 | 7936976609835 |
| 12 | 93190238832601 |
| 13 | 1084660596151891 |
| 14 | 12532810309612945 |
| 15 | 143923263421271355 |
[1,31,625,10395,155001,2155251,28559665,365471515, 4555708201,55646962371,668889963105,7936976609835, 93190238832601,1084660596151891,12532810309612945, 143923263421271355] |