The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 2 |
| 6 | 2 |
| 7 | 4 |
| 8 | 4 |
| 9 | 6 |
| 10 | 0 |
| 11 | 10 |
| 12 | 2 |
| 13 | 3 |
| 14 | 2 |
| 15 | 3 |
| 16 | 6 |
| 17 | 9 |
| 18 | 8 |
| 19 | 11 |
| 20 | 12 |
| 21 | 11 |
| 22 | 14 |
| 23 | 15 |
| 24 | 18 |
| 25 | 23 |
| 26 | 24 |
| 27 | 23 |
| 28 | 24 |
| 29 | 23 |
| 30 | 24 |
| 31 | 4 |
| 32 | 4 |
| 33 | 6 |
| 34 | 4 |
| 35 | 10 |
| 36 | 8 |
| 37 | 10 |
| 38 | 12 |
| 39 | 12 |
| 40 | 14 |
| 41 | 16 |
| 42 | 14 |
| 43 | 20 |
| 44 | 18 |
| 45 | 18 |
| 46 | 16 |
| 47 | 24 |
| 48 | 32 |
| 49 | 32 |
| 50 | 30 |
| 51 | 30 |
| 52 | 32 |
| 53 | 30 |
| 54 | 36 |
| 55 | 38 |
| 56 | 40 |
| 57 | 42 |
| 58 | 40 |
| 59 | 42 |
| 60 | 42 |
| 61 | 40 |
| 62 | 46 |
| 63 | 56 |
| 64 | 56 |
| 65 | 54 |
| 66 | 54 |
| 67 | 64 |
| 68 | 66 |
| 69 | 3 |
| 70 | 0 |
| 71 | 70 |
| 72 | 0 |
| 73 | 3 |
| 74 | 4 |
| 75 | 5 |
| 76 | 4 |
| 77 | 5 |
| 78 | 8 |
| 79 | 7 |
| 80 | 10 |
| 81 | 15 |
[0,0,0,0,2,2,4,4,6,0,10,2,3,2,3,6,9,8,11,12,11,14, 15,18,23,24,23,24,23,24,4,4,6,4,10,8,10,12,12,14, 16,14,20,18,18,16,24,32,32,30,30,32,30,36,38,40, 42,40,42,42,40,46,56,56,54,54,64,66,3,0,70,0,3,4, 5,4,5,8,7,10,15] |