The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 9 |
| 6 | 15 |
| 7 | 27 |
| 8 | 46 |
| 9 | 80 |
| 10 | 138 |
| 11 | 238 |
| 12 | 413 |
| 13 | 713 |
| 14 | 1235 |
| 15 | 2136 |
| 16 | 3695 |
| 17 | 6393 |
| 18 | 11057 |
| 19 | 19130 |
| 20 | 33091 |
| 21 | 57246 |
| 22 | 99032 |
| 23 | 171315 |
| 24 | 296365 |
| 25 | 512682 |
| 26 | 886902 |
| 27 | 1534266 |
| 28 | 2654154 |
| 29 | 4591475 |
| 30 | 7942870 |
| 31 | 13740526 |
| 32 | 23769981 |
| 33 | 41120131 |
| 34 | 71134474 |
| 35 | 123056829 |
| 36 | 212878289 |
| 37 | 368262059 |
| 38 | 637063333 |
[1,2,3,5,9,15,27,46,80,138,238,413,713,1235,2136, 3695,6393,11057,19130,33091,57246,99032,171315, 296365,512682,886902,1534266,2654154,4591475, 7942870,13740526,23769981,41120131,71134474, 123056829,212878289,368262059,637063333] |