| n | a(n) |
|---|---|
| -1 | 1 |
| 0 | 0 |
| 1 | 0 |
| 2 | -1 |
| 3 | 1 |
| 4 | -1 |
| 5 | 1 |
| 6 | -1 |
| 7 | 2 |
| 8 | -2 |
| 9 | 2 |
| 10 | -2 |
| 11 | 3 |
| 12 | -3 |
| 13 | 3 |
| 14 | -4 |
| 15 | 5 |
| 16 | -5 |
| 17 | 5 |
| 18 | -6 |
| 19 | 7 |
| 20 | -8 |
| 21 | 8 |
| 22 | -10 |
| 23 | 12 |
| 24 | -12 |
| 25 | 13 |
| 26 | -15 |
| 27 | 17 |
| 28 | -18 |
| 29 | 19 |
| 30 | -22 |
| 31 | 25 |
| 32 | -27 |
| 33 | 28 |
| 34 | -32 |
| 35 | 36 |
| 36 | -38 |
| 37 | 41 |
| 38 | -46 |
| 39 | 51 |
| 40 | -54 |
| 41 | 58 |
| 42 | -64 |
| 43 | 71 |
| 44 | -76 |
| 45 | 81 |
| 46 | -89 |
| 47 | 99 |
| 48 | -105 |
| 49 | 112 |
| 50 | -123 |
| 51 | 134 |
| 52 | -143 |
| 53 | 153 |
| 54 | -167 |
| 55 | 182 |
| 56 | -194 |
| 57 | 207 |
| 58 | -225 |
| 59 | 244 |
| 60 | -260 |
| 61 | 277 |
| 62 | -301 |
| 63 | 325 |
| 64 | -346 |
| 65 | 369 |
| 66 | -398 |
| 67 | 429 |
| 68 | -458 |
[1,0,0,-1,1,-1,1,-1,2,-2,2,-2,3,-3,3,-4,5,-5,5,-6, 7,-8,8,-10,12,-12,13,-15,17,-18,19,-22,25,-27,28, -32,36,-38,41,-46,51,-54,58,-64,71,-76,81,-89,99, -105,112,-123,134,-143,153,-167,182,-194,207,-225, 244,-260,277,-301,325,-346,369,-398,429,-458] |