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