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 | -2 |
| 5 | 1 |
| 6 | 0 |
| 7 | 1 |
| 8 | -4 |
| 9 | 1 |
| 10 | 0 |
| 11 | 0 |
| 12 | 6 |
| 13 | -6 |
| 14 | 1 |
| 15 | 0 |
| 16 | 0 |
| 17 | -4 |
| 18 | 15 |
| 19 | -8 |
| 20 | 1 |
| 21 | 0 |
| 22 | 0 |
| 23 | 1 |
| 24 | -20 |
| 25 | 28 |
| 26 | -10 |
| 27 | 1 |
| 28 | 0 |
| 29 | 0 |
| 30 | 0 |
| 31 | 15 |
| 32 | -56 |
| 33 | 45 |
| 34 | -12 |
| 35 | 1 |
| 36 | 0 |
| 37 | 0 |
| 38 | 0 |
| 39 | -6 |
| 40 | 70 |
| 41 | -120 |
| 42 | 66 |
| 43 | -14 |
| 44 | 1 |
| 45 | 0 |
| 46 | 0 |
| 47 | 0 |
| 48 | 1 |
| 49 | -56 |
| 50 | 210 |
| 51 | -220 |
| 52 | 91 |
| 53 | -16 |
| 54 | 1 |
| 55 | 0 |
| 56 | 0 |
| 57 | 0 |
| 58 | 0 |
| 59 | 28 |
| 60 | -252 |
| 61 | 495 |
| 62 | -364 |
| 63 | 120 |
| 64 | -18 |
| 65 | 1 |
[1,0,1,0,-2,1,0,1,-4,1,0,0,6,-6,1,0,0,-4,15,-8,1, 0,0,1,-20,28,-10,1,0,0,0,15,-56,45,-12,1,0,0,0,-6, 70,-120,66,-14,1,0,0,0,1,-56,210,-220,91,-16,1,0, 0,0,0,28,-252,495,-364,120,-18,1] |