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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | -1 |
| 5 | -1 |
| 6 | 0 |
| 7 | 1 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 1 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 2 |
| 17 | 2 |
| 18 | 3 |
| 19 | 2 |
| 20 | 2 |
| 21 | 0 |
| 22 | 1 |
| 23 | 3 |
| 24 | 3 |
| 25 | 4 |
| 26 | 3 |
| 27 | 3 |
| 28 | 0 |
| 29 | 3 |
| 30 | 4 |
| 31 | 6 |
| 32 | 6 |
| 33 | 7 |
| 34 | 6 |
| 35 | 6 |
| 36 | 0 |
| 37 | 2 |
| 38 | 5 |
| 39 | 6 |
| 40 | 8 |
| 41 | 8 |
| 42 | 9 |
| 43 | 8 |
| 44 | 8 |
| 45 | 0 |
| 46 | 4 |
| 47 | 6 |
| 48 | 9 |
| 49 | 10 |
| 50 | 12 |
| 51 | 12 |
| 52 | 13 |
| 53 | 12 |
| 54 | 12 |
| 55 | 0 |
| 56 | 3 |
| 57 | 7 |
| 58 | 9 |
| 59 | 12 |
| 60 | 13 |
| 61 | 15 |
| 62 | 15 |
| 63 | 16 |
| 64 | 15 |
| 65 | 15 |
| 66 | 0 |
| 67 | 5 |
| 68 | 8 |
| 69 | 12 |
| 70 | 14 |
| 71 | 17 |
| 72 | 18 |
| 73 | 20 |
| 74 | 20 |
| 75 | 21 |
| 76 | 20 |
| 77 | 20 |
[0,0,0,0,-1,-1,0,1,0,0,0,0,1,0,0,0,2,2,3,2,2,0,1, 3,3,4,3,3,0,3,4,6,6,7,6,6,0,2,5,6,8,8,9,8,8,0,4,6, 9,10,12,12,13,12,12,0,3,7,9,12,13,15,15,16,15,15, 0,5,8,12,14,17,18,20,20,21,20,20] |