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 | -1 |
| 6 | 0 |
| 7 | 2 |
| 8 | 1 |
| 9 | -1 |
| 10 | -1 |
| 11 | -1 |
| 12 | -1 |
| 13 | 0 |
| 14 | 2 |
| 15 | 4 |
| 16 | 2 |
| 17 | -4 |
| 18 | -6 |
| 19 | -2 |
| 20 | 0 |
| 21 | 2 |
| 22 | 10 |
| 23 | 11 |
| 24 | -4 |
| 25 | -17 |
| 26 | -14 |
| 27 | -4 |
| 28 | 7 |
| 29 | 22 |
| 30 | 30 |
| 31 | 11 |
| 32 | -31 |
| 33 | -57 |
| 34 | -35 |
| 35 | 15 |
| 36 | 56 |
| 37 | 80 |
| 38 | 64 |
| 39 | -32 |
| 40 | -152 |
| 41 | -160 |
| 42 | -28 |
| 43 | 136 |
| 44 | 240 |
| 45 | 228 |
| 46 | 29 |
| 47 | -312 |
| 48 | -521 |
| 49 | -324 |
| 50 | 208 |
| 51 | 691 |
| 52 | 784 |
| 53 | 358 |
| 54 | -523 |
| 55 | -1401 |
| 56 | -1417 |
| 57 | -149 |
| 58 | 1631 |
| 59 | 2560 |
| 60 | 1826 |
| 61 | -492 |
| 62 | -3366 |
| 63 | -4692 |
[1,0,-1,0,0,-1,0,2,1,-1,-1,-1,-1,0,2,4,2,-4,-6,-2, 0,2,10,11,-4,-17,-14,-4,7,22,30,11,-31,-57,-35,15, 56,80,64,-32,-152,-160,-28,136,240,228,29,-312, -521,-324,208,691,784,358,-523,-1401,-1417,-149, 1631,2560,1826,-492,-3366,-4692] |