The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 3 |
| 5 | 2 |
| 6 | 4 |
| 7 | 6 |
| 8 | 9 |
| 9 | 13 |
| 10 | 18 |
| 11 | 21 |
| 12 | 34 |
| 13 | 42 |
| 14 | 58 |
| 15 | 74 |
| 16 | 104 |
| 17 | 124 |
| 18 | 171 |
| 19 | 210 |
| 20 | 278 |
| 21 | 346 |
| 22 | 448 |
| 23 | 546 |
| 24 | 711 |
| 25 | 866 |
| 26 | 1094 |
| 27 | 1338 |
| 28 | 1684 |
| 29 | 2036 |
| 30 | 2546 |
| 31 | 3074 |
| 32 | 3798 |
| 33 | 4583 |
| 34 | 5618 |
| 35 | 6741 |
| 36 | 8237 |
| 37 | 9848 |
| 38 | 11927 |
| 39 | 14246 |
| 40 | 17177 |
| 41 | 20418 |
| 42 | 24516 |
| 43 | 29067 |
| 44 | 34719 |
| 45 | 41078 |
| 46 | 48856 |
| 47 | 57605 |
| 48 | 68310 |
[0,1,0,1,3,2,4,6,9,13,18,21,34,42,58,74,104,124, 171,210,278,346,448,546,711,866,1094,1338,1684, 2036,2546,3074,3798,4583,5618,6741,8237,9848, 11927,14246,17177,20418,24516,29067,34719,41078, 48856,57605,68310] |