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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 255 |
| 3 | 3199 |
| 4 | 37289 |
| 5 | 389786 |
| 6 | 3786373 |
| 7 | 35086917 |
| 8 | 313383975 |
| 9 | 2722202345 |
| 10 | 23125021135 |
| 11 | 192903953186 |
| 12 | 1584994453962 |
| 13 | 12857492370098 |
| 14 | 103163663735209 |
| 15 | 819927701417438 |
| 16 | 6462788122534314 |
| 17 | 50569048938103665 |
| 18 | 393119079521861335 |
[6,255,3199,37289,389786,3786373,35086917, 313383975,2722202345,23125021135,192903953186, 1584994453962,12857492370098,103163663735209, 819927701417438,6462788122534314, 50569048938103665,393119079521861335] |