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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | -1 |
| 4 | 0 |
| 5 | 8 |
| 6 | 0 |
| 7 | -8 |
| 8 | 0 |
| 9 | 48 |
| 10 | 1 |
| 11 | 0 |
| 12 | -72 |
| 13 | 0 |
| 14 | 384 |
| 15 | 0 |
| 16 | 18 |
| 17 | 0 |
| 18 | -768 |
| 19 | 0 |
| 20 | 3840 |
| 21 | -1 |
| 22 | 0 |
| 23 | 288 |
| 24 | 0 |
| 25 | -9600 |
| 26 | 0 |
| 27 | 46080 |
| 28 | 0 |
| 29 | -32 |
| 30 | 0 |
| 31 | 4800 |
| 32 | 0 |
| 33 | -138240 |
| 34 | 0 |
| 35 | 645120 |
| 36 | 1 |
| 37 | 0 |
| 38 | -800 |
| 39 | 0 |
| 40 | 86400 |
| 41 | 0 |
| 42 | -2257920 |
| 43 | 0 |
| 44 | 10321920 |
| 45 | 0 |
| 46 | 50 |
| 47 | 0 |
| 48 | -19200 |
| 49 | 0 |
| 50 | 1693440 |
| 51 | 0 |
| 52 | -41287680 |
| 53 | 0 |
| 54 | 185794560 |
[1,0,2,-1,0,8,0,-8,0,48,1,0,-72,0,384,0,18,0,-768, 0,3840,-1,0,288,0,-9600,0,46080,0,-32,0,4800,0, -138240,0,645120,1,0,-800,0,86400,0,-2257920,0, 10321920,0,50,0,-19200,0,1693440,0,-41287680,0, 185794560] |