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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 1 |
| 9 | 2 |
| 10 | 2 |
| 11 | 4 |
| 12 | 5 |
| 13 | 7 |
| 14 | 9 |
| 15 | 14 |
| 16 | 17 |
| 17 | 23 |
| 18 | 28 |
| 19 | 37 |
| 20 | 44 |
| 21 | 56 |
| 22 | 66 |
| 23 | 83 |
| 24 | 98 |
| 25 | 119 |
| 26 | 139 |
| 27 | 168 |
| 28 | 194 |
| 29 | 229 |
| 30 | 263 |
| 31 | 309 |
| 32 | 352 |
| 33 | 408 |
| 34 | 462 |
| 35 | 532 |
| 36 | 600 |
| 37 | 683 |
| 38 | 766 |
| 39 | 869 |
| 40 | 969 |
| 41 | 1090 |
| 42 | 1211 |
| 43 | 1356 |
| 44 | 1500 |
| 45 | 1670 |
| 46 | 1840 |
| 47 | 2041 |
| 48 | 2242 |
| 49 | 2473 |
| 50 | 2707 |
| 51 | 2978 |
| 52 | 3249 |
[0,0,0,0,0,0,1,1,2,2,4,5,7,9,14,17,23,28,37,44,56, 66,83,98,119,139,168,194,229,263,309,352,408,462, 532,600,683,766,869,969,1090,1211,1356,1500,1670, 1840,2041,2242,2473,2707,2978,3249] |