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