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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 2 |
| 3 | -2 |
| 4 | 0 |
| 5 | 6 |
| 6 | 0 |
| 7 | -12 |
| 8 | 0 |
| 9 | 20 |
| 10 | 6 |
| 11 | 0 |
| 12 | -60 |
| 13 | 0 |
| 14 | 70 |
| 15 | 0 |
| 16 | 60 |
| 17 | 0 |
| 18 | -280 |
| 19 | 0 |
| 20 | 252 |
| 21 | -20 |
| 22 | 0 |
| 23 | 420 |
| 24 | 0 |
| 25 | -1260 |
| 26 | 0 |
| 27 | 924 |
| 28 | 0 |
| 29 | -280 |
| 30 | 0 |
| 31 | 2520 |
| 32 | 0 |
| 33 | -5544 |
| 34 | 0 |
| 35 | 3432 |
| 36 | 70 |
| 37 | 0 |
| 38 | -2520 |
| 39 | 0 |
| 40 | 13860 |
| 41 | 0 |
| 42 | -24024 |
| 43 | 0 |
| 44 | 12870 |
| 45 | 0 |
| 46 | 1260 |
| 47 | 0 |
| 48 | -18480 |
| 49 | 0 |
| 50 | 72072 |
| 51 | 0 |
| 52 | -102960 |
| 53 | 0 |
| 54 | 48620 |
| 55 | -252 |
| 56 | 0 |
| 57 | 13860 |
| 58 | 0 |
| 59 | -120120 |
| 60 | 0 |
| 61 | 360360 |
| 62 | 0 |
| 63 | -437580 |
| 64 | 0 |
| 65 | 184756 |
[1,0,2,-2,0,6,0,-12,0,20,6,0,-60,0,70,0,60,0,-280, 0,252,-20,0,420,0,-1260,0,924,0,-280,0,2520,0, -5544,0,3432,70,0,-2520,0,13860,0,-24024,0,12870, 0,1260,0,-18480,0,72072,0,-102960,0,48620,-252,0, 13860,0,-120120,0,360360,0,-437580,0,184756] |