The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 3 |
| 6 | 5 |
| 7 | 5 |
| 8 | 11 |
| 9 | 19 |
| 10 | 33 |
| 11 | 55 |
| 12 | 92 |
| 13 | 192 |
| 14 | 327 |
| 15 | 579 |
| 16 | 1142 |
| 17 | 2052 |
| 18 | 3776 |
| 19 | 6936 |
| 20 | 12964 |
| 21 | 24308 |
| 22 | 44432 |
| 23 | 84763 |
| 24 | 159299 |
| 25 | 299093 |
| 26 | 567295 |
| 27 | 1075570 |
| 28 | 2045580 |
| 29 | 3883453 |
| 30 | 7411014 |
| 31 | 14164089 |
| 32 | 27044407 |
| 33 | 51759660 |
| 34 | 99259961 |
| 35 | 190371661 |
| 36 | 365537357 |
| 37 | 702901278 |
| 38 | 1352868238 |
| 39 | 2606296357 |
[1,1,2,1,3,5,5,11,19,33,55,92,192,327,579,1142, 2052,3776,6936,12964,24308,44432,84763,159299, 299093,567295,1075570,2045580,3883453,7411014, 14164089,27044407,51759660,99259961,190371661, 365537357,702901278,1352868238,2606296357] |