The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | -1 |
| 7 | 0 |
| 8 | -1 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 1 |
| 13 | 0 |
| 14 | 1 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | -1 |
| 19 | 0 |
| 20 | -1 |
| 21 | 0 |
| 22 | -1 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 1 |
| 27 | 0 |
| 28 | 1 |
| 29 | 0 |
| 30 | 0 |
| 31 | 0 |
| 32 | -1 |
| 33 | 0 |
| 34 | -1 |
| 35 | 0 |
| 36 | 0 |
| 37 | 0 |
| 38 | 1 |
| 39 | 0 |
| 40 | 1 |
[1,0,1,0,0,0,-1,0,-1,0,0,0,1,0,1,0,0,0,-1,0,-1,0, -1,0,0,0,1,0,1,0,0,0,-1,0,-1,0,0,0,1,0,1] |