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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 51 |
| 4 | 310 |
| 5 | 1865 |
| 6 | 67146 |
| 7 | 2417263 |
| 8 | 87021476 |
| 9 | 3132773145 |
| 10 | 112779833230 |
| 11 | 4060073996291 |
| 12 | 146162663866488 |
| 13 | 5261855899193581 |
| 14 | 189426812370968930 |
| 15 | 6819365245354881495 |
| 16 | 245497148832775733836 |
| 17 | 8837897357979926418113 |
[1,8,51,310,1865,67146,2417263,87021476, 3132773145,112779833230,4060073996291, 146162663866488,5261855899193581, 189426812370968930,6819365245354881495, 245497148832775733836,8837897357979926418113] |