The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | -1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 0 |
| 9 | -2 |
| 10 | -1 |
| 11 | 0 |
| 12 | 2 |
| 13 | 2 |
| 14 | 0 |
| 15 | -2 |
| 16 | -3 |
| 17 | 0 |
| 18 | 3 |
| 19 | 3 |
| 20 | 0 |
| 21 | -4 |
| 22 | -4 |
| 23 | 0 |
| 24 | 5 |
| 25 | 6 |
| 26 | 0 |
| 27 | -6 |
| 28 | -7 |
| 29 | 0 |
| 30 | 7 |
| 31 | 8 |
| 32 | 0 |
| 33 | -10 |
| 34 | -10 |
| 35 | 0 |
| 36 | 13 |
| 37 | 13 |
| 38 | 0 |
| 39 | -14 |
| 40 | -16 |
| 41 | 0 |
| 42 | 17 |
| 43 | 18 |
| 44 | 0 |
| 45 | -22 |
| 46 | -22 |
| 47 | 0 |
| 48 | 26 |
| 49 | 28 |
| 50 | 0 |
| 51 | -30 |
| 52 | -33 |
| 53 | 0 |
| 54 | 36 |
| 55 | 38 |
| 56 | 0 |
| 57 | -44 |
| 58 | -45 |
| 59 | 0 |
| 60 | 52 |
| 61 | 55 |
| 62 | 0 |
| 63 | -60 |
| 64 | -65 |
| 65 | 0 |
| 66 | 70 |
| 67 | 74 |
| 68 | 0 |
| 69 | -84 |
[1,1,0,0,-1,0,1,1,0,-2,-1,0,2,2,0,-2,-3,0,3,3,0, -4,-4,0,5,6,0,-6,-7,0,7,8,0,-10,-10,0,13,13,0,-14, -16,0,17,18,0,-22,-22,0,26,28,0,-30,-33,0,36,38,0, -44,-45,0,52,55,0,-60,-65,0,70,74,0,-84] |