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