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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -2 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 4 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | -10 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 20 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | -36 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 64 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | -110 |
| 26 | 0 |
| 27 | 0 |
| 28 | 0 |
| 29 | 180 |
| 30 | 0 |
| 31 | 0 |
| 32 | 0 |
| 33 | -288 |
| 34 | 0 |
| 35 | 0 |
| 36 | 0 |
| 37 | 452 |
| 38 | 0 |
| 39 | 0 |
| 40 | 0 |
| 41 | -692 |
| 42 | 0 |
| 43 | 0 |
| 44 | 0 |
| 45 | 1044 |
| 46 | 0 |
| 47 | 0 |
| 48 | 0 |
| 49 | -1554 |
| 50 | 0 |
| 51 | 0 |
| 52 | 0 |
| 53 | 2276 |
| 54 | 0 |
| 55 | 0 |
| 56 | 0 |
| 57 | -3296 |
| 58 | 0 |
| 59 | 0 |
| 60 | 0 |
| 61 | 4724 |
| 62 | 0 |
| 63 | 0 |
| 64 | 0 |
| 65 | -6696 |
| 66 | 0 |
| 67 | 0 |
| 68 | 0 |
| 69 | 9408 |
| 70 | 0 |
| 71 | 0 |
[1,-2,0,0,0,4,0,0,0,-10,0,0,0,20,0,0,0,-36,0,0,0, 64,0,0,0,-110,0,0,0,180,0,0,0,-288,0,0,0,452,0,0, 0,-692,0,0,0,1044,0,0,0,-1554,0,0,0,2276,0,0,0, -3296,0,0,0,4724,0,0,0,-6696,0,0,0,9408,0,0] |