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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 68 |
| 4 | 33 |
| 5 | 709 |
| 6 | 2313 |
| 7 | 13251 |
| 8 | 17961 |
| 9 | 231881 |
| 10 | 525323 |
| 11 | 4172904 |
| 12 | 7163595 |
[2,5,68,33,709,2313,13251,17961,231881,525323, 4172904,7163595] |