The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 7 |
| 7 | 11 |
| 8 | 16 |
| 9 | 25 |
| 10 | 39 |
| 11 | 59 |
| 12 | 91 |
| 13 | 141 |
| 14 | 216 |
| 15 | 332 |
| 16 | 512 |
| 17 | 787 |
| 18 | 1210 |
| 19 | 1863 |
| 20 | 2866 |
| 21 | 4408 |
| 22 | 6783 |
| 23 | 10436 |
| 24 | 16054 |
| 25 | 24700 |
| 26 | 38002 |
| 27 | 58464 |
| 28 | 89947 |
| 29 | 138385 |
| 30 | 212903 |
| 31 | 327550 |
| 32 | 503937 |
| 33 | 775304 |
| 34 | 1192801 |
| 35 | 1835123 |
| 36 | 2823330 |
| 37 | 4343681 |
| 38 | 6682741 |
| 39 | 10281375 |
| 40 | 15817857 |
| 41 | 24335721 |
[1,1,1,2,3,4,7,11,16,25,39,59,91,141,216,332,512, 787,1210,1863,2866,4408,6783,10436,16054,24700, 38002,58464,89947,138385,212903,327550,503937, 775304,1192801,1835123,2823330,4343681,6682741, 10281375,15817857,24335721] |