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| n | a(n) |
|---|---|
| -1 | 1 |
| 0 | 1 |
| 1 | -1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | -1 |
| 6 | 0 |
| 7 | 3 |
| 8 | 0 |
| 9 | -2 |
| 10 | 0 |
| 11 | 2 |
| 12 | 0 |
| 13 | -5 |
| 14 | 0 |
| 15 | 6 |
| 16 | 0 |
| 17 | -7 |
| 18 | 0 |
| 19 | 7 |
| 20 | 0 |
| 21 | -9 |
| 22 | 0 |
| 23 | 12 |
| 24 | 0 |
| 25 | -13 |
| 26 | 0 |
| 27 | 16 |
| 28 | 0 |
| 29 | -20 |
| 30 | 0 |
| 31 | 25 |
| 32 | 0 |
| 33 | -27 |
| 34 | 0 |
| 35 | 31 |
| 36 | 0 |
| 37 | -38 |
| 38 | 0 |
| 39 | 44 |
| 40 | 0 |
| 41 | -51 |
| 42 | 0 |
| 43 | 58 |
| 44 | 0 |
| 45 | -69 |
| 46 | 0 |
| 47 | 80 |
| 48 | 0 |
| 49 | -92 |
| 50 | 0 |
| 51 | 102 |
| 52 | 0 |
| 53 | -118 |
| 54 | 0 |
| 55 | 141 |
| 56 | 0 |
| 57 | -157 |
| 58 | 0 |
| 59 | 177 |
| 60 | 0 |
| 61 | -203 |
| 62 | 0 |
| 63 | 234 |
| 64 | 0 |
| 65 | -261 |
| 66 | 0 |
| 67 | 292 |
| 68 | 0 |
[1,1,-1,0,1,0,-1,0,3,0,-2,0,2,0,-5,0,6,0,-7,0,7,0, -9,0,12,0,-13,0,16,0,-20,0,25,0,-27,0,31,0,-38,0, 44,0,-51,0,58,0,-69,0,80,0,-92,0,102,0,-118,0,141, 0,-157,0,177,0,-203,0,234,0,-261,0,292,0] |