The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | -1 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | -1 |
| 14 | 1 |
| 15 | 0 |
| 16 | 0 |
| 17 | 1 |
| 18 | -2 |
| 19 | 0 |
| 20 | 0 |
| 21 | -1 |
| 22 | 3 |
| 23 | -1 |
| 24 | 0 |
| 25 | 1 |
| 26 | -4 |
| 27 | 3 |
| 28 | 0 |
| 29 | -1 |
| 30 | 4 |
| 31 | -6 |
| 32 | 1 |
| 33 | 1 |
| 34 | -4 |
| 35 | 10 |
| 36 | -4 |
| 37 | -1 |
| 38 | 4 |
| 39 | -13 |
| 40 | 10 |
| 41 | 0 |
| 42 | -4 |
| 43 | 15 |
| 44 | -20 |
| 45 | 4 |
| 46 | 5 |
| 47 | -16 |
| 48 | 32 |
| 49 | -14 |
| 50 | -5 |
| 51 | 16 |
| 52 | -44 |
| 53 | 34 |
| 54 | 1 |
| 55 | -17 |
| 56 | 54 |
| 57 | -65 |
| 58 | 13 |
| 59 | 19 |
| 60 | -60 |
| 61 | 105 |
| 62 | -48 |
| 63 | -18 |
| 64 | 64 |
| 65 | -149 |
| 66 | 113 |
| 67 | 4 |
| 68 | -69 |
| 69 | 189 |
[1,1,0,0,0,-1,0,0,0,1,0,0,0,-1,1,0,0,1,-2,0,0,-1, 3,-1,0,1,-4,3,0,-1,4,-6,1,1,-4,10,-4,-1,4,-13,10, 0,-4,15,-20,4,5,-16,32,-14,-5,16,-44,34,1,-17,54, -65,13,19,-60,105,-48,-18,64,-149,113,4,-69,189] |