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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 51 |
| 3 | 758 |
| 4 | 13009 |
| 5 | 120096 |
| 6 | 1268728 |
| 7 | 8360853 |
| 8 | 58395657 |
| 9 | 309819522 |
| 10 | 1599103606 |
| 11 | 6891312239 |
| 12 | 29648211631 |
| 13 | 108584697209 |
| 14 | 395584327260 |
| 15 | 1292379405268 |
| 16 | 4136956355752 |
| 17 | 12134954233672 |
| 18 | 35217094178978 |
[1,51,758,13009,120096,1268728,8360853,58395657, 309819522,1599103606,6891312239,29648211631, 108584697209,395584327260,1292379405268, 4136956355752,12134954233672,35217094178978] |