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