The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 0 |
| 5 | 2 |
| 6 | 0 |
| 7 | 2 |
| 8 | 2 |
| 9 | 2 |
| 10 | 3 |
| 11 | 1 |
| 12 | 3 |
| 13 | 2 |
| 14 | 3 |
| 15 | 3 |
| 16 | 3 |
| 17 | 4 |
| 18 | 3 |
| 19 | 3 |
| 20 | 3 |
| 21 | 4 |
| 22 | 3 |
| 23 | 4 |
| 24 | 3 |
| 25 | 4 |
| 26 | 4 |
| 27 | 4 |
| 28 | 5 |
| 29 | 4 |
| 30 | 5 |
| 31 | 4 |
| 32 | 4 |
| 33 | 4 |
| 34 | 5 |
| 35 | 4 |
| 36 | 5 |
| 37 | 4 |
| 38 | 5 |
| 39 | 5 |
| 40 | 5 |
| 41 | 6 |
| 42 | 5 |
| 43 | 5 |
| 44 | 5 |
| 45 | 6 |
| 46 | 5 |
| 47 | 6 |
| 48 | 5 |
| 49 | 6 |
| 50 | 5 |
| 51 | 6 |
| 52 | 5 |
| 53 | 6 |
| 54 | 5 |
| 55 | 6 |
| 56 | 6 |
| 57 | 6 |
| 58 | 7 |
[0,0,1,1,0,2,0,2,2,2,3,1,3,2,3,3,3,4,3,3,3,4,3,4, 3,4,4,4,5,4,5,4,4,4,5,4,5,4,5,5,5,6,5,5,5,6,5,6,5, 6,5,6,5,6,5,6,6,6,7] |