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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 7 |
| 4 | 91 |
| 5 | 1771 |
| 6 | 46376 |
| 7 | 1533939 |
| 8 | 61474519 |
| 9 | 2898753715 |
| 10 | 157366449604 |
| 11 | 9672348219898 |
| 12 | 664226242466073 |
| 13 | 50419551102990876 |
| 14 | 4193002458968329488 |
| 15 | 379189865879906158731 |
| 16 | 37054233830964389244975 |
[1,7,91,1771,46376,1533939,61474519,2898753715, 157366449604,9672348219898,664226242466073, 50419551102990876,4193002458968329488, 379189865879906158731,37054233830964389244975] |