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