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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -3 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 15 |
| 7 | 0 |
| 8 | -10 |
| 9 | 0 |
| 10 | -105 |
| 11 | 0 |
| 12 | 1 |
| 13 | 0 |
| 14 | 105 |
| 15 | 0 |
| 16 | 945 |
| 17 | 0 |
| 18 | -21 |
| 19 | 0 |
| 20 | -1260 |
| 21 | 0 |
| 22 | -10395 |
| 23 | 0 |
| 24 | 1 |
| 25 | 0 |
| 26 | 378 |
| 27 | 0 |
| 28 | 17325 |
| 29 | 0 |
| 30 | 135135 |
| 31 | 0 |
| 32 | -36 |
| 33 | 0 |
| 34 | -6930 |
| 35 | 0 |
| 36 | -270270 |
| 37 | 0 |
| 38 | -2027025 |
| 39 | 0 |
| 40 | 1 |
| 41 | 0 |
| 42 | 990 |
| 43 | 0 |
| 44 | 135135 |
| 45 | 0 |
| 46 | 4729725 |
| 47 | 0 |
| 48 | 34459425 |
| 49 | 0 |
| 50 | -55 |
| 51 | 0 |
| 52 | -25740 |
| 53 | 0 |
| 54 | -2837835 |
| 55 | 0 |
| 56 | -91891800 |
| 57 | 0 |
[1,0,-3,0,1,0,15,0,-10,0,-105,0,1,0,105,0,945,0, -21,0,-1260,0,-10395,0,1,0,378,0,17325,0,135135,0, -36,0,-6930,0,-270270,0,-2027025,0,1,0,990,0, 135135,0,4729725,0,34459425,0,-55,0,-25740,0, -2837835,0,-91891800,0] |