| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | -1 |
| 2 | -2 |
| 3 | 1 |
| 4 | -3 |
| 5 | 2 |
| 6 | 3 |
| 7 | -4 |
| 8 | -5 |
| 9 | 4 |
| 10 | 5 |
| 11 | -6 |
| 12 | 6 |
| 13 | -7 |
| 14 | -8 |
| 15 | 7 |
| 16 | -9 |
| 17 | 8 |
| 18 | 9 |
| 19 | -10 |
| 20 | 10 |
| 21 | -11 |
| 22 | -12 |
| 23 | 11 |
| 24 | 12 |
| 25 | -13 |
| 26 | -14 |
| 27 | 13 |
| 28 | -15 |
| 29 | 14 |
| 30 | 15 |
| 31 | -16 |
| 32 | -17 |
| 33 | 16 |
| 34 | 17 |
| 35 | -18 |
| 36 | 18 |
| 37 | -19 |
| 38 | -20 |
| 39 | 19 |
| 40 | 20 |
| 41 | -21 |
| 42 | -22 |
| 43 | 21 |
| 44 | -23 |
| 45 | 22 |
| 46 | 23 |
| 47 | -24 |
| 48 | 24 |
| 49 | -25 |
| 50 | -26 |
| 51 | 25 |
| 52 | -27 |
| 53 | 26 |
| 54 | 27 |
| 55 | -28 |
| 56 | -29 |
| 57 | 28 |
| 58 | 29 |
| 59 | -30 |
| 60 | 30 |
| 61 | -31 |
| 62 | -32 |
| 63 | 31 |
| 64 | -33 |
| 65 | 32 |
| 66 | 33 |
| 67 | -34 |
| 68 | 34 |
| 69 | -35 |
| 70 | -36 |
| 71 | 35 |
| 72 | 36 |
[0,-1,-2,1,-3,2,3,-4,-5,4,5,-6,6,-7,-8,7,-9,8,9, -10,10,-11,-12,11,12,-13,-14,13,-15,14,15,-16,-17, 16,17,-18,18,-19,-20,19,20,-21,-22,21,-23,22,23, -24,24,-25,-26,25,-27,26,27,-28,-29,28,29,-30,30, -31,-32,31,-33,32,33,-34,34,-35,-36,35,36] |