The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 2 |
| 10 | 3 |
| 11 | 4 |
| 12 | 7 |
| 13 | 6 |
| 14 | 11 |
| 15 | 13 |
| 16 | 24 |
| 17 | 20 |
| 18 | 37 |
| 19 | 44 |
| 20 | 81 |
| 21 | 68 |
| 22 | 125 |
| 23 | 149 |
| 24 | 274 |
| 25 | 230 |
| 26 | 423 |
| 27 | 504 |
| 28 | 927 |
| 29 | 778 |
| 30 | 1431 |
| 31 | 1705 |
| 32 | 3136 |
| 33 | 2632 |
| 34 | 4841 |
| 35 | 5768 |
| 36 | 10609 |
| 37 | 8904 |
| 38 | 16377 |
| 39 | 19513 |
| 40 | 35890 |
| 41 | 30122 |
| 42 | 55403 |
| 43 | 66012 |
| 44 | 121415 |
| 45 | 101902 |
| 46 | 187427 |
| 47 | 223317 |
| 48 | 410744 |
| 49 | 344732 |
[0,0,1,0,1,0,1,1,2,2,3,4,7,6,11,13,24,20,37,44,81, 68,125,149,274,230,423,504,927,778,1431,1705,3136, 2632,4841,5768,10609,8904,16377,19513,35890,30122, 55403,66012,121415,101902,187427,223317,410744, 344732] |