The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 1 |
| 6 | 4 |
| 7 | 6 |
| 8 | 5 |
| 9 | 7 |
| 10 | 15 |
| 11 | 21 |
| 12 | 23 |
| 13 | 34 |
| 14 | 58 |
| 15 | 80 |
| 16 | 101 |
| 17 | 149 |
| 18 | 230 |
| 19 | 319 |
| 20 | 431 |
| 21 | 629 |
| 22 | 928 |
| 23 | 1299 |
| 24 | 1810 |
| 25 | 2617 |
| 26 | 3784 |
| 27 | 5336 |
| 28 | 7536 |
| 29 | 10828 |
| 30 | 15521 |
| 31 | 21992 |
| 32 | 31236 |
| 33 | 44713 |
| 34 | 63862 |
| 35 | 90741 |
| 36 | 129177 |
| 37 | 184524 |
| 38 | 263178 |
| 39 | 374521 |
| 40 | 533619 |
| 41 | 761403 |
| 42 | 1085401 |
| 43 | 1545839 |
| 44 | 2203162 |
[0,1,2,1,1,4,6,5,7,15,21,23,34,58,80,101,149,230, 319,431,629,928,1299,1810,2617,3784,5336,7536, 10828,15521,21992,31236,44713,63862,90741,129177, 184524,263178,374521,533619,761403,1085401, 1545839,2203162] |