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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 0 |
| 4 | 29 |
| 5 | 7 |
| 6 | 120 |
| 7 | 13 |
| 8 | 455 |
| 9 | 116 |
| 10 | 1925 |
| 11 | 229 |
| 12 | 7207 |
| 13 | 2028 |
| 14 | 31209 |
| 15 | 3531 |
| 16 | 116618 |
| 17 | 29835 |
| 18 | 492682 |
| 19 | 58507 |
| 20 | 1844874 |
| 21 | 519819 |
| 22 | 7990922 |
| 23 | 903819 |
| 24 | 29855370 |
| 25 | 7637899 |
| 26 | 126127754 |
| 27 | 14977675 |
| 28 | 472288138 |
| 29 | 133073547 |
| 30 | 2045677226 |
| 31 | 231377579 |
| 32 | 7642974890 |
| 33 | 1955237547 |
| 34 | 32288443562 |
[1,1,7,0,29,7,120,13,455,116,1925,229,7207,2028, 31209,3531,116618,29835,492682,58507,1844874, 519819,7990922,903819,29855370,7637899,126127754, 14977675,472288138,133073547,2045677226,231377579, 7642974890,1955237547,32288443562] |