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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 5 |
| 4 | 35 |
| 5 | 2915 |
| 6 | 30771 |
| 7 | 4037381 |
| 8 | 48954659 |
| 9 | 7782070631 |
| 10 | 17875901604959 |
| 11 | 242158352370063 |
| 12 | 637739431824553035 |
| 13 | 126348774791431208099 |
| 14 | 1794903484322270273951 |
| 15 | 367972191114796344623951 |
| 16 | 1116504994413003106003899551 |
| 17 | 3498520498083111051973370669639 |
[1,5,35,2915,30771,4037381,48954659,7782070631, 17875901604959,242158352370063,637739431824553035, 126348774791431208099,1794903484322270273951, 367972191114796344623951, 1116504994413003106003899551, 3498520498083111051973370669639] |