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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 0 |
| 4 | -4 |
| 5 | 1 |
| 6 | 7 |
| 7 | 0 |
| 8 | -8 |
| 9 | 1 |
| 10 | 11 |
| 11 | 0 |
| 12 | -12 |
| 13 | 1 |
| 14 | 15 |
| 15 | 0 |
| 16 | -16 |
| 17 | 1 |
| 18 | 19 |
| 19 | 0 |
| 20 | -20 |
| 21 | 1 |
| 22 | 23 |
| 23 | 0 |
| 24 | -24 |
| 25 | 1 |
| 26 | 27 |
| 27 | 0 |
| 28 | -28 |
| 29 | 1 |
| 30 | 31 |
| 31 | 0 |
| 32 | -32 |
| 33 | 1 |
| 34 | 35 |
| 35 | 0 |
| 36 | -36 |
| 37 | 1 |
| 38 | 39 |
| 39 | 0 |
| 40 | -40 |
| 41 | 1 |
| 42 | 43 |
| 43 | 0 |
| 44 | -44 |
| 45 | 1 |
| 46 | 47 |
| 47 | 0 |
| 48 | -48 |
| 49 | 1 |
| 50 | 51 |
| 51 | 0 |
| 52 | -52 |
| 53 | 1 |
| 54 | 55 |
| 55 | 0 |
[1,3,0,-4,1,7,0,-8,1,11,0,-12,1,15,0,-16,1,19,0, -20,1,23,0,-24,1,27,0,-28,1,31,0,-32,1,35,0,-36,1, 39,0,-40,1,43,0,-44,1,47,0,-48,1,51,0,-52,1,55,0] |