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