The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 7 |
| 8 | 11 |
| 9 | 16 |
| 10 | 26 |
| 11 | 39 |
| 12 | 63 |
| 13 | 95 |
| 14 | 154 |
| 15 | 235 |
| 16 | 381 |
| 17 | 585 |
| 18 | 948 |
| 19 | 1464 |
| 20 | 2373 |
| 21 | 3682 |
| 22 | 5967 |
| 23 | 9293 |
| 24 | 15060 |
| 25 | 23531 |
| 26 | 38131 |
| 27 | 59741 |
| 28 | 96801 |
| 29 | 152020 |
| 30 | 246310 |
| 31 | 387611 |
| 32 | 627985 |
| 33 | 990027 |
| 34 | 1603893 |
| 35 | 2532609 |
| 36 | 4102726 |
| 37 | 6487600 |
| 38 | 10509114 |
| 39 | 16639214 |
| 40 | 26952186 |
| 41 | 42722941 |
| 42 | 69199472 |
[1,1,1,1,2,3,5,7,11,16,26,39,63,95,154,235,381, 585,948,1464,2373,3682,5967,9293,15060,23531, 38131,59741,96801,152020,246310,387611,627985, 990027,1603893,2532609,4102726,6487600,10509114, 16639214,26952186,42722941,69199472] |