The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 4 |
| 9 | 5 |
| 10 | 7 |
| 11 | 7 |
| 12 | 10 |
| 13 | 17 |
| 14 | 24 |
| 15 | 29 |
| 16 | 41 |
| 17 | 41 |
| 18 | 58 |
| 19 | 99 |
| 20 | 140 |
| 21 | 169 |
| 22 | 239 |
| 23 | 239 |
| 24 | 338 |
| 25 | 577 |
| 26 | 816 |
| 27 | 985 |
| 28 | 1393 |
| 29 | 1393 |
| 30 | 1970 |
| 31 | 3363 |
| 32 | 4756 |
| 33 | 5741 |
| 34 | 8119 |
| 35 | 8119 |
| 36 | 11482 |
| 37 | 19601 |
| 38 | 27720 |
| 39 | 33461 |
| 40 | 47321 |
| 41 | 47321 |
| 42 | 66922 |
| 43 | 114243 |
| 44 | 161564 |
| 45 | 195025 |
| 46 | 275807 |
| 47 | 275807 |
| 48 | 390050 |
| 49 | 665857 |
| 50 | 941664 |
| 51 | 1136689 |
| 52 | 1607521 |
[1,0,1,1,1,2,3,4,5,7,7,10,17,24,29,41,41,58,99, 140,169,239,239,338,577,816,985,1393,1393,1970, 3363,4756,5741,8119,8119,11482,19601,27720,33461, 47321,47321,66922,114243,161564,195025,275807, 275807,390050,665857,941664,1136689,1607521] |