The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -2 |
| 3 | -1 |
| 4 | -1 |
| 5 | -1 |
| 6 | -1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 2 |
| 10 | 2 |
| 11 | 4 |
| 12 | 5 |
| 13 | 5 |
| 14 | 5 |
| 15 | 6 |
| 16 | 7 |
| 17 | 5 |
| 18 | 3 |
| 19 | 4 |
| 20 | 3 |
| 21 | 0 |
| 22 | -2 |
| 23 | -3 |
| 24 | -5 |
| 25 | -10 |
| 26 | -14 |
| 27 | -16 |
| 28 | -18 |
| 29 | -23 |
| 30 | -28 |
| 31 | -28 |
| 32 | -29 |
| 33 | -35 |
| 34 | -38 |
| 35 | -37 |
| 36 | -37 |
| 37 | -39 |
| 38 | -39 |
| 39 | -35 |
| 40 | -30 |
| 41 | -29 |
| 42 | -26 |
| 43 | -15 |
| 44 | -5 |
| 45 | 0 |
| 46 | 10 |
| 47 | 26 |
| 48 | 41 |
| 49 | 51 |
| 50 | 64 |
| 51 | 85 |
| 52 | 105 |
| 53 | 119 |
| 54 | 135 |
| 55 | 160 |
| 56 | 183 |
| 57 | 196 |
| 58 | 212 |
| 59 | 236 |
| 60 | 255 |
| 61 | 265 |
[1,-1,-2,-1,-1,-1,-1,1,2,2,2,4,5,5,5,6,7,5,3,4,3, 0,-2,-3,-5,-10,-14,-16,-18,-23,-28,-28,-29,-35, -38,-37,-37,-39,-39,-35,-30,-29,-26,-15,-5,0,10, 26,41,51,64,85,105,119,135,160,183,196,212,236, 255,265] |