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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 9 |
| 4 | 9 |
| 5 | 9 |
| 6 | 105 |
| 7 | 137 |
| 8 | 41 |
| 9 | 777 |
| 10 | 1577 |
| 11 | 3337 |
| 12 | 6185 |
| 13 | 13577 |
| 14 | 24617 |
| 15 | 54537 |
| 16 | 98345 |
| 17 | 226569 |
| 18 | 442409 |
| 19 | 902409 |
| 20 | 1716265 |
| 21 | 3347721 |
| 22 | 7979049 |
| 23 | 12535049 |
| 24 | 1732649 |
| 25 | 57693449 |
| 26 | 115277865 |
| 27 | 228410633 |
| 28 | 441462825 |
| 29 | 857052425 |
| 30 | 1744879657 |
| 31 | 3411952905 |
| 32 | 7050326057 |
| 33 | 13493097737 |
[1,1,1,9,9,9,105,137,41,777,1577,3337,6185,13577, 24617,54537,98345,226569,442409,902409,1716265, 3347721,7979049,12535049,1732649,57693449, 115277865,228410633,441462825,857052425, 1744879657,3411952905,7050326057,13493097737] |