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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 8 |
| 6 | 0 |
| 7 | 78 |
| 8 | 3 |
| 9 | 0 |
| 10 | 944 |
| 11 | 80 |
| 12 | 0 |
| 13 | 13800 |
| 14 | 1810 |
| 15 | 15 |
| 16 | 0 |
| 17 | 237432 |
| 18 | 41664 |
| 19 | 840 |
| 20 | 0 |
| 21 | 4708144 |
| 22 | 1022252 |
| 23 | 34300 |
| 24 | 105 |
| 25 | 0 |
| 26 | 105822432 |
| 27 | 27098784 |
| 28 | 1286432 |
| 29 | 10080 |
| 30 | 0 |
| 31 | 2660215680 |
| 32 | 778128336 |
| 33 | 47790540 |
| 34 | 648900 |
| 35 | 945 |
| 36 | 0 |
| 37 | 73983185000 |
| 38 | 24165049920 |
| 39 | 1815578160 |
| 40 | 36048320 |
| 41 | 138600 |
[1,0,0,1,0,8,0,78,3,0,944,80,0,13800,1810,15,0, 237432,41664,840,0,4708144,1022252,34300,105,0, 105822432,27098784,1286432,10080,0,2660215680, 778128336,47790540,648900,945,0,73983185000, 24165049920,1815578160,36048320,138600] |