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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 17 |
| 2 | 142 |
| 3 | 1177 |
| 4 | 9722 |
| 5 | 80177 |
| 6 | 660742 |
| 7 | 5443417 |
| 8 | 44838002 |
| 9 | 369310097 |
| 10 | 3041743102 |
| 11 | 25052304217 |
| 12 | 206333614442 |
| 13 | 1699381942577 |
| 14 | 13996241263222 |
| 15 | 115274054938777 |
| 16 | 949405180105442 |
| 17 | 7819366458163217 |
| 18 | 64400836914689902 |
| 19 | 530409682773219097 |
[2,17,142,1177,9722,80177,660742,5443417,44838002, 369310097,3041743102,25052304217,206333614442, 1699381942577,13996241263222,115274054938777, 949405180105442,7819366458163217, 64400836914689902,530409682773219097] |