The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 2 |
| 11 | 2 |
| 12 | 2 |
| 13 | 2 |
| 14 | 2 |
| 15 | 2 |
| 16 | 2 |
| 17 | 2 |
| 18 | 2 |
| 19 | 3 |
| 20 | 4 |
| 21 | 4 |
| 22 | 4 |
| 23 | 4 |
| 24 | 4 |
| 25 | 4 |
| 26 | 4 |
| 27 | 4 |
| 28 | 5 |
| 29 | 6 |
| 30 | 7 |
| 31 | 7 |
| 32 | 7 |
| 33 | 7 |
| 34 | 7 |
| 35 | 7 |
| 36 | 7 |
| 37 | 8 |
| 38 | 10 |
| 39 | 11 |
| 40 | 12 |
| 41 | 12 |
| 42 | 12 |
| 43 | 12 |
| 44 | 12 |
| 45 | 12 |
| 46 | 13 |
| 47 | 15 |
| 48 | 17 |
| 49 | 18 |
| 50 | 19 |
| 51 | 19 |
| 52 | 19 |
| 53 | 19 |
| 54 | 19 |
| 55 | 20 |
| 56 | 23 |
| 57 | 26 |
| 58 | 28 |
| 59 | 29 |
| 60 | 30 |
| 61 | 30 |
| 62 | 30 |
| 63 | 30 |
| 64 | 31 |
| 65 | 34 |
| 66 | 38 |
| 67 | 41 |
| 68 | 43 |
| 69 | 44 |
| 70 | 45 |
| 71 | 45 |
| 72 | 45 |
| 73 | 46 |
| 74 | 50 |
| 75 | 55 |
| 76 | 60 |
| 77 | 63 |
| 78 | 65 |
| 79 | 66 |
| 80 | 67 |
| 81 | 67 |
| 82 | 68 |
[1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,3,4,4,4,4,4, 4,4,4,5,6,7,7,7,7,7,7,7,8,10,11,12,12,12,12,12,12, 13,15,17,18,19,19,19,19,19,20,23,26,28,29,30,30, 30,30,31,34,38,41,43,44,45,45,45,46,50,55,60,63, 65,66,67,67,68] |