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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 0 |
| 6 | 2 |
| 7 | 1 |
| 8 | 2 |
| 9 | 2 |
| 10 | 3 |
| 11 | 2 |
| 12 | 6 |
| 13 | 5 |
| 14 | 8 |
| 15 | 9 |
| 16 | 11 |
| 17 | 11 |
| 18 | 17 |
| 19 | 17 |
| 20 | 23 |
| 21 | 26 |
| 22 | 32 |
| 23 | 36 |
| 24 | 47 |
| 25 | 51 |
| 26 | 63 |
| 27 | 71 |
| 28 | 84 |
| 29 | 93 |
| 30 | 115 |
| 31 | 127 |
| 32 | 151 |
| 33 | 171 |
| 34 | 201 |
| 35 | 225 |
| 36 | 266 |
| 37 | 297 |
| 38 | 346 |
| 39 | 389 |
| 40 | 448 |
| 41 | 501 |
| 42 | 580 |
| 43 | 648 |
| 44 | 740 |
| 45 | 831 |
| 46 | 945 |
| 47 | 1056 |
| 48 | 1201 |
| 49 | 1340 |
| 50 | 1517 |
| 51 | 1695 |
| 52 | 1910 |
| 53 | 2130 |
| 54 | 2399 |
| 55 | 2670 |
[0,0,0,1,0,0,2,1,2,2,3,2,6,5,8,9,11,11,17,17,23, 26,32,36,47,51,63,71,84,93,115,127,151,171,201, 225,266,297,346,389,448,501,580,648,740,831,945, 1056,1201,1340,1517,1695,1910,2130,2399,2670] |