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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -2 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 2 |
| 6 | -4 |
| 7 | 0 |
| 8 | 0 |
| 9 | 2 |
| 10 | 4 |
| 11 | -8 |
| 12 | 0 |
| 13 | 0 |
| 14 | 4 |
| 15 | 8 |
| 16 | -14 |
| 17 | 0 |
| 18 | 0 |
| 19 | 8 |
| 20 | 14 |
| 21 | -24 |
| 22 | 0 |
| 23 | 0 |
| 24 | 12 |
| 25 | 22 |
| 26 | -40 |
| 27 | 0 |
| 28 | 0 |
| 29 | 20 |
| 30 | 36 |
| 31 | -64 |
| 32 | 0 |
| 33 | 0 |
| 34 | 32 |
| 35 | 56 |
| 36 | -98 |
| 37 | 0 |
| 38 | 0 |
| 39 | 48 |
| 40 | 84 |
| 41 | -148 |
| 42 | 0 |
| 43 | 0 |
| 44 | 72 |
| 45 | 126 |
| 46 | -220 |
| 47 | 0 |
| 48 | 0 |
| 49 | 106 |
| 50 | 184 |
| 51 | -320 |
| 52 | 0 |
| 53 | 0 |
| 54 | 152 |
| 55 | 264 |
| 56 | -460 |
| 57 | 0 |
| 58 | 0 |
| 59 | 216 |
| 60 | 376 |
| 61 | -652 |
| 62 | 0 |
| 63 | 0 |
| 64 | 306 |
| 65 | 528 |
| 66 | -912 |
| 67 | 0 |
| 68 | 0 |
| 69 | 424 |
| 70 | 732 |
| 71 | -1264 |
| 72 | 0 |
| 73 | 0 |
| 74 | 584 |
| 75 | 1008 |
[1,-2,0,0,2,2,-4,0,0,2,4,-8,0,0,4,8,-14,0,0,8,14, -24,0,0,12,22,-40,0,0,20,36,-64,0,0,32,56,-98,0,0, 48,84,-148,0,0,72,126,-220,0,0,106,184,-320,0,0, 152,264,-460,0,0,216,376,-652,0,0,306,528,-912,0, 0,424,732,-1264,0,0,584,1008] |