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