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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 149 |
| 3 | 751 |
| 4 | 6392 |
| 5 | 56472 |
| 6 | 413450 |
| 7 | 3352423 |
| 8 | 27025949 |
| 9 | 212040472 |
| 10 | 1694099411 |
| 11 | 13495015207 |
| 12 | 107114515475 |
| 13 | 852810786694 |
| 14 | 6784375565061 |
| 15 | 53949128904820 |
| 16 | 429213532471317 |
| 17 | 3414173807924736 |
| 18 | 27156955992465880 |
| 19 | 216027779239218668 |
[9,149,751,6392,56472,413450,3352423,27025949, 212040472,1694099411,13495015207,107114515475, 852810786694,6784375565061,53949128904820, 429213532471317,3414173807924736, 27156955992465880,216027779239218668] |