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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 6 |
| 5 | 0 |
| 6 | 1 |
| 7 | -12 |
| 8 | 24 |
| 9 | 0 |
| 10 | 1 |
| 11 | 100 |
| 12 | -60 |
| 13 | 60 |
| 14 | 0 |
| 15 | 1 |
| 16 | -540 |
| 17 | 960 |
| 18 | -180 |
| 19 | 120 |
| 20 | 0 |
| 21 | 1 |
| 22 | 4158 |
| 23 | -6300 |
| 24 | 4620 |
| 25 | -420 |
| 26 | 210 |
| 27 | 0 |
| 28 | 1 |
| 29 | -33600 |
| 30 | 71904 |
| 31 | -35280 |
| 32 | 15680 |
| 33 | -840 |
| 34 | 336 |
| 35 | 0 |
| 36 | 1 |
| 37 | 310896 |
| 38 | -725760 |
| 39 | 557928 |
| 40 | -136080 |
| 41 | 42840 |
| 42 | -1512 |
| 43 | 504 |
| 44 | 0 |
| 45 | 1 |
| 46 | -3160080 |
| 47 | 8723520 |
| 48 | -6652800 |
[1,0,1,6,0,1,-12,24,0,1,100,-60,60,0,1,-540,960, -180,120,0,1,4158,-6300,4620,-420,210,0,1,-33600, 71904,-35280,15680,-840,336,0,1,310896,-725760, 557928,-136080,42840,-1512,504,0,1,-3160080, 8723520,-6652800] |