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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 18 |
| 3 | 250 |
| 4 | 3358 |
| 5 | 42282 |
| 6 | 502154 |
| 7 | 5710302 |
| 8 | 62782966 |
| 9 | 672520310 |
| 10 | 7056533978 |
| 11 | 72819524370 |
| 12 | 741279145398 |
| 13 | 7460955607878 |
| 14 | 74381377429158 |
| 15 | 735539563061590 |
| 16 | 7222916531541006 |
| 17 | 70499118369836786 |
| 18 | 684459097597365542 |
[2,18,250,3358,42282,502154,5710302,62782966, 672520310,7056533978,72819524370,741279145398, 7460955607878,74381377429158,735539563061590, 7222916531541006,70499118369836786, 684459097597365542] |