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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 7 |
| 5 | 7 |
| 6 | 21 |
| 7 | 0 |
| 8 | 125 |
| 9 | 124 |
| 10 | 341 |
| 11 | 0 |
| 12 | 2029 |
| 13 | 1964 |
| 14 | 5517 |
| 15 | 428 |
| 16 | 32141 |
| 17 | 32140 |
| 18 | 87437 |
| 19 | 396 |
| 20 | 519565 |
| 21 | 503180 |
| 22 | 1412493 |
| 23 | 109964 |
| 24 | 8228237 |
| 25 | 8228236 |
| 26 | 22384013 |
| 27 | 101772 |
| 28 | 133008781 |
| 29 | 128814476 |
| 30 | 361598349 |
| 31 | 28151180 |
| 32 | 2106428813 |
| 33 | 2106428812 |
| 34 | 5730307469 |
| 35 | 26054028 |
[1,0,1,0,7,7,21,0,125,124,341,0,2029,1964,5517, 428,32141,32140,87437,396,519565,503180,1412493, 109964,8228237,8228236,22384013,101772,133008781, 128814476,361598349,28151180,2106428813, 2106428812,5730307469,26054028] |