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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 2 |
| 7 | 1 |
| 8 | 2 |
| 9 | 3 |
| 10 | 3 |
| 11 | 5 |
| 12 | 5 |
| 13 | 7 |
| 14 | 8 |
| 15 | 10 |
| 16 | 11 |
| 17 | 15 |
| 18 | 15 |
| 19 | 20 |
| 20 | 22 |
| 21 | 26 |
| 22 | 31 |
| 23 | 35 |
| 24 | 41 |
| 25 | 47 |
| 26 | 54 |
| 27 | 62 |
| 28 | 71 |
| 29 | 80 |
| 30 | 92 |
| 31 | 102 |
| 32 | 117 |
| 33 | 131 |
| 34 | 148 |
| 35 | 166 |
| 36 | 186 |
| 37 | 208 |
| 38 | 233 |
| 39 | 259 |
| 40 | 290 |
| 41 | 322 |
| 42 | 357 |
| 43 | 398 |
| 44 | 439 |
| 45 | 488 |
| 46 | 539 |
| 47 | 595 |
| 48 | 657 |
| 49 | 723 |
| 50 | 796 |
| 51 | 877 |
| 52 | 962 |
| 53 | 1057 |
| 54 | 1159 |
| 55 | 1268 |
| 56 | 1391 |
| 57 | 1520 |
| 58 | 1663 |
| 59 | 1815 |
| 60 | 1981 |
[0,0,0,0,1,0,2,1,2,3,3,5,5,7,8,10,11,15,15,20,22, 26,31,35,41,47,54,62,71,80,92,102,117,131,148,166, 186,208,233,259,290,322,357,398,439,488,539,595, 657,723,796,877,962,1057,1159,1268,1391,1520,1663, 1815,1981] |