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 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 3 |
| 8 | 4 |
| 9 | 4 |
| 10 | 4 |
| 11 | 5 |
| 12 | 7 |
| 13 | 7 |
| 14 | 8 |
| 15 | 9 |
| 16 | 10 |
| 17 | 9 |
| 18 | 10 |
| 19 | 11 |
| 20 | 11 |
| 21 | 11 |
| 22 | 13 |
| 23 | 13 |
| 24 | 15 |
| 25 | 15 |
| 26 | 16 |
| 27 | 16 |
| 28 | 18 |
| 29 | 18 |
| 30 | 19 |
| 31 | 20 |
| 32 | 21 |
| 33 | 20 |
| 34 | 21 |
| 35 | 22 |
| 36 | 22 |
| 37 | 22 |
| 38 | 24 |
| 39 | 25 |
| 40 | 25 |
| 41 | 25 |
| 42 | 26 |
| 43 | 26 |
| 44 | 28 |
| 45 | 28 |
| 46 | 29 |
| 47 | 30 |
| 48 | 32 |
| 49 | 31 |
| 50 | 32 |
[0,0,1,1,1,3,3,4,4,4,5,7,7,8,9,10,9,10,11,11,11, 13,13,15,15,16,16,18,18,19,20,21,20,21,22,22,22, 24,25,25,25,26,26,28,28,29,30,32,31,32] |