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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 161 |
| 4 | 5153 |
| 5 | 257649 |
| 6 | 18550729 |
| 7 | 1817971441 |
| 8 | 232700344449 |
| 9 | 37697455800737 |
| 10 | 7539491160147401 |
| 11 | 1824556860755671041 |
| 12 | 525472375897633259809 |
| 13 | 177609663053400041815441 |
| 14 | 69622987916932816391652873 |
| 15 | 31330344562619767376243792849 |
| 16 | 16041136416061320896636821938689 |
[1,1,9,161,5153,257649,18550729,1817971441, 232700344449,37697455800737,7539491160147401, 1824556860755671041,525472375897633259809, 177609663053400041815441, 69622987916932816391652873, 31330344562619767376243792849, 16041136416061320896636821938689] |