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