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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 6 |
| 3 | 1 |
| 4 | 16 |
| 5 | 7 |
| 6 | 120 |
| 7 | 71 |
| 8 | 416 |
| 9 | 95 |
| 10 | 1408 |
| 11 | 1151 |
| 12 | 6272 |
| 13 | 1535 |
| 14 | 18560 |
| 15 | 6527 |
| 16 | 81408 |
| 17 | 25087 |
| 18 | 389120 |
| 19 | 387071 |
| 20 | 1824768 |
| 21 | 501759 |
| 22 | 5234688 |
| 23 | 1884159 |
| 24 | 24223744 |
| 25 | 22765567 |
| 26 | 111050752 |
| 27 | 63275007 |
| 28 | 321552384 |
| 29 | 152961023 |
| 30 | 1387692032 |
| 31 | 616792063 |
| 32 | 5560991744 |
| 33 | 2423128063 |
[1,0,6,1,16,7,120,71,416,95,1408,1151,6272,1535, 18560,6527,81408,25087,389120,387071,1824768, 501759,5234688,1884159,24223744,22765567, 111050752,63275007,321552384,152961023,1387692032, 616792063,5560991744,2423128063] |