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