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 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 1 |
| 10 | 2 |
| 11 | 2 |
| 12 | 2 |
| 13 | 3 |
| 14 | 5 |
| 15 | 3 |
| 16 | 5 |
| 17 | 3 |
| 18 | 6 |
| 19 | 7 |
| 20 | 8 |
| 21 | 4 |
| 22 | 8 |
| 23 | 6 |
| 24 | 10 |
| 25 | 8 |
| 26 | 10 |
| 27 | 7 |
| 28 | 14 |
| 29 | 10 |
| 30 | 16 |
| 31 | 12 |
| 32 | 14 |
| 33 | 9 |
| 34 | 16 |
| 35 | 14 |
| 36 | 17 |
| 37 | 12 |
| 38 | 17 |
| 39 | 16 |
| 40 | 25 |
| 41 | 15 |
| 42 | 20 |
| 43 | 20 |
| 44 | 23 |
| 45 | 20 |
| 46 | 25 |
| 47 | 20 |
| 48 | 28 |
| 49 | 22 |
| 50 | 25 |
| 51 | 23 |
| 52 | 30 |
| 53 | 23 |
| 54 | 31 |
| 55 | 28 |
| 56 | 33 |
| 57 | 28 |
| 58 | 35 |
| 59 | 32 |
| 60 | 36 |
| 61 | 30 |
| 62 | 33 |
| 63 | 32 |
| 64 | 44 |
| 65 | 35 |
| 66 | 34 |
| 67 | 37 |
| 68 | 42 |
| 69 | 43 |
| 70 | 49 |
| 71 | 39 |
| 72 | 42 |
| 73 | 42 |
| 74 | 44 |
| 75 | 49 |
| 76 | 49 |
| 77 | 40 |
| 78 | 45 |
| 79 | 51 |
[0,0,0,0,0,0,0,1,1,2,2,2,3,5,3,5,3,6,7,8,4,8,6,10, 8,10,7,14,10,16,12,14,9,16,14,17,12,17,16,25,15, 20,20,23,20,25,20,28,22,25,23,30,23,31,28,33,28, 35,32,36,30,33,32,44,35,34,37,42,43,49,39,42,42, 44,49,49,40,45,51] |