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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | -2 |
| 4 | 2 |
| 5 | -2 |
| 6 | 3 |
| 7 | -4 |
| 8 | 5 |
| 9 | -6 |
| 10 | 7 |
| 11 | -10 |
| 12 | 13 |
| 13 | -14 |
| 14 | 17 |
| 15 | -22 |
| 16 | 26 |
| 17 | -30 |
| 18 | 36 |
| 19 | -44 |
| 20 | 52 |
| 21 | -60 |
| 22 | 70 |
| 23 | -84 |
| 24 | 99 |
| 25 | -112 |
| 26 | 131 |
| 27 | -156 |
| 28 | 179 |
| 29 | -204 |
| 30 | 236 |
| 31 | -274 |
| 32 | 315 |
| 33 | -358 |
| 34 | 409 |
| 35 | -472 |
| 36 | 539 |
| 37 | -608 |
| 38 | 692 |
| 39 | -792 |
| 40 | 897 |
| 41 | -1010 |
| 42 | 1144 |
| 43 | -1298 |
| 44 | 1464 |
| 45 | -1644 |
| 46 | 1849 |
| 47 | -2088 |
| 48 | 2347 |
| 49 | -2622 |
| 50 | 2940 |
| 51 | -3304 |
[1,0,1,-2,2,-2,3,-4,5,-6,7,-10,13,-14,17,-22,26, -30,36,-44,52,-60,70,-84,99,-112,131,-156,179, -204,236,-274,315,-358,409,-472,539,-608,692,-792, 897,-1010,1144,-1298,1464,-1644,1849,-2088,2347, -2622,2940,-3304] |