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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 12 |
| 6 | 0 |
| 7 | 0 |
| 8 | 54 |
| 9 | 54 |
| 10 | 0 |
| 11 | 0 |
| 12 | 432 |
| 13 | 408 |
| 14 | 432 |
| 15 | 0 |
| 16 | 0 |
| 17 | 3108 |
| 18 | 8748 |
| 19 | 8748 |
| 20 | 3108 |
| 21 | 0 |
| 22 | 0 |
| 23 | 22428 |
| 24 | 154632 |
| 25 | 559872 |
| 26 | 154632 |
| 27 | 22428 |
| 28 | 0 |
| 29 | 0 |
| 30 | 162504 |
| 31 | 2772906 |
| 32 | 28978992 |
| 33 | 28978992 |
| 34 | 2772906 |
| 35 | 162504 |
| 36 | 0 |
| 37 | 0 |
| 38 | 1175592 |
| 39 | 49910578 |
| 40 | 1509045552 |
| 41 | 4265306528 |
| 42 | 1509045552 |
| 43 | 49910578 |
[0,0,0,0,12,0,0,54,54,0,0,432,408,432,0,0,3108, 8748,8748,3108,0,0,22428,154632,559872,154632, 22428,0,0,162504,2772906,28978992,28978992, 2772906,162504,0,0,1175592,49910578,1509045552, 4265306528,1509045552,49910578] |