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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 63 |
| 3 | 659 |
| 4 | 9727 |
| 5 | 187511 |
| 6 | 4304943 |
| 7 | 109312739 |
| 8 | 2941124607 |
| 9 | 82033399631 |
| 10 | 2345394917563 |
| 11 | 68306797052879 |
| 12 | 2018580243252847 |
| 13 | 60368874298729631 |
| 14 | 1823588997226603663 |
| 15 | 55558079041172790659 |
| 16 | 1705174802761490321407 |
| 17 | 52672634815976274443711 |
| 18 | 1636296942340074307669443 |
[11,63,659,9727,187511,4304943,109312739, 2941124607,82033399631,2345394917563, 68306797052879,2018580243252847,60368874298729631, 1823588997226603663,55558079041172790659, 1705174802761490321407,52672634815976274443711, 1636296942340074307669443] |