The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 3 |
| 10 | 4 |
| 11 | 5 |
| 12 | 7 |
| 13 | 8 |
| 14 | 10 |
| 15 | 12 |
| 16 | 14 |
| 17 | 16 |
| 18 | 18 |
| 19 | 19 |
| 20 | 20 |
| 21 | 21 |
| 22 | 21 |
| 23 | 21 |
| 24 | 21 |
| 25 | 20 |
| 26 | 19 |
| 27 | 18 |
| 28 | 16 |
| 29 | 14 |
| 30 | 12 |
| 31 | 10 |
| 32 | 8 |
| 33 | 7 |
| 34 | 5 |
| 35 | 4 |
| 36 | 3 |
| 37 | 2 |
| 38 | 1 |
| 39 | 1 |
| 40 | 0 |
| 41 | 0 |
| 42 | 0 |
| 43 | 0 |
| 44 | 0 |
| 45 | 0 |
| 46 | 0 |
| 47 | 0 |
| 48 | 0 |
| 49 | 0 |
| 50 | 0 |
| 51 | 0 |
| 52 | 0 |
| 53 | 0 |
| 54 | 0 |
| 55 | 0 |
| 56 | 0 |
| 57 | 0 |
| 58 | 0 |
| 59 | 0 |
| 60 | 0 |
| 61 | 0 |
| 62 | 0 |
| 63 | 0 |
| 64 | 0 |
| 65 | 0 |
| 66 | 0 |
| 67 | 0 |
| 68 | 0 |
| 69 | 0 |
| 70 | 0 |
| 71 | 0 |
| 72 | 0 |
[0,0,0,0,0,0,1,1,2,3,4,5,7,8,10,12,14,16,18,19,20, 21,21,21,21,20,19,18,16,14,12,10,8,7,5,4,3,2,1,1, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0] |