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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -2 |
| 3 | -1 |
| 4 | 0 |
| 5 | 2 |
| 6 | 0 |
| 7 | 6 |
| 8 | 0 |
| 9 | -4 |
| 10 | 3 |
| 11 | 0 |
| 12 | -12 |
| 13 | 0 |
| 14 | 4 |
| 15 | 0 |
| 16 | -30 |
| 17 | 0 |
| 18 | 40 |
| 19 | 0 |
| 20 | -8 |
| 21 | -15 |
| 22 | 0 |
| 23 | 90 |
| 24 | 0 |
| 25 | -60 |
| 26 | 0 |
| 27 | 8 |
| 28 | 0 |
| 29 | 210 |
| 30 | 0 |
| 31 | -420 |
| 32 | 0 |
| 33 | 168 |
| 34 | 0 |
| 35 | -16 |
| 36 | 105 |
| 37 | 0 |
| 38 | -840 |
| 39 | 0 |
| 40 | 840 |
| 41 | 0 |
| 42 | -224 |
| 43 | 0 |
| 44 | 16 |
| 45 | 0 |
| 46 | -1890 |
| 47 | 0 |
| 48 | 5040 |
| 49 | 0 |
| 50 | -3024 |
| 51 | 0 |
| 52 | 576 |
| 53 | 0 |
| 54 | -32 |
| 55 | -945 |
| 56 | 0 |
| 57 | 9450 |
| 58 | 0 |
| 59 | -12600 |
| 60 | 0 |
| 61 | 5040 |
| 62 | 0 |
| 63 | -720 |
| 64 | 0 |
| 65 | 32 |
| 66 | 0 |
| 67 | 20790 |
| 68 | 0 |
| 69 | -69300 |
| 70 | 0 |
| 71 | 55440 |
| 72 | 0 |
| 73 | -15840 |
| 74 | 0 |
| 75 | 1760 |
| 76 | 0 |
| 77 | -64 |
[1,0,-2,-1,0,2,0,6,0,-4,3,0,-12,0,4,0,-30,0,40,0, -8,-15,0,90,0,-60,0,8,0,210,0,-420,0,168,0,-16, 105,0,-840,0,840,0,-224,0,16,0,-1890,0,5040,0, -3024,0,576,0,-32,-945,0,9450,0,-12600,0,5040,0, -720,0,32,0,20790,0,-69300,0,55440,0,-15840,0, 1760,0,-64] |