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