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