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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 7 |
| 3 | 0 |
| 4 | 29 |
| 5 | 4 |
| 6 | 125 |
| 7 | 12 |
| 8 | 477 |
| 9 | 92 |
| 10 | 1993 |
| 11 | 178 |
| 12 | 7456 |
| 13 | 1123 |
| 14 | 32036 |
| 15 | 3385 |
| 16 | 121898 |
| 17 | 23976 |
| 18 | 511403 |
| 19 | 46506 |
| 20 | 1909162 |
| 21 | 294314 |
| 22 | 8207786 |
| 23 | 856490 |
| 24 | 31200682 |
| 25 | 6145450 |
| 26 | 130897322 |
| 27 | 11879850 |
| 28 | 488640938 |
| 29 | 75482538 |
| 30 | 2100843946 |
| 31 | 220152232 |
| 32 | 7987221931 |
| 33 | 1574388138 |
| 34 | 33508711850 |
[1,0,7,0,29,4,125,12,477,92,1993,178,7456,1123, 32036,3385,121898,23976,511403,46506,1909162, 294314,8207786,856490,31200682,6145450,130897322, 11879850,488640938,75482538,2100843946,220152232, 7987221931,1574388138,33508711850] |