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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 2 |
| 4 | -1 |
| 5 | 0 |
| 6 | 6 |
| 7 | -8 |
| 8 | 2 |
| 9 | 0 |
| 10 | 24 |
| 11 | -66 |
| 12 | 44 |
| 13 | -6 |
| 14 | 0 |
| 15 | 120 |
| 16 | -624 |
| 17 | 792 |
| 18 | -312 |
| 19 | 24 |
| 20 | 0 |
| 21 | 720 |
| 22 | -6840 |
| 23 | 14496 |
| 24 | -10872 |
| 25 | 2736 |
| 26 | -120 |
| 27 | 0 |
| 28 | 5040 |
| 29 | -86400 |
| 30 | 285840 |
| 31 | -347904 |
| 32 | 171504 |
| 33 | -28800 |
| 34 | 720 |
| 35 | 0 |
| 36 | 40320 |
| 37 | -1244880 |
| 38 | 6181920 |
| 39 | -11245680 |
| 40 | 8996544 |
| 41 | -3090960 |
| 42 | 355680 |
| 43 | -5040 |
| 44 | 0 |
[1,1,0,2,-1,0,6,-8,2,0,24,-66,44,-6,0,120,-624, 792,-312,24,0,720,-6840,14496,-10872,2736,-120,0, 5040,-86400,285840,-347904,171504,-28800,720,0, 40320,-1244880,6181920,-11245680,8996544,-3090960, 355680,-5040,0] |