The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 10 |
| 6 | 17 |
| 7 | 27 |
| 8 | 45 |
| 9 | 72 |
| 10 | 116 |
| 11 | 187 |
| 12 | 302 |
| 13 | 486 |
| 14 | 782 |
| 15 | 1259 |
| 16 | 2026 |
| 17 | 3261 |
| 18 | 5249 |
| 19 | 8449 |
| 20 | 13598 |
| 21 | 21885 |
| 22 | 35223 |
| 23 | 56690 |
| 24 | 91239 |
| 25 | 146843 |
| 26 | 236336 |
| 27 | 380368 |
| 28 | 612178 |
| 29 | 985263 |
| 30 | 1585721 |
| 31 | 2552119 |
| 32 | 4107478 |
| 33 | 6610731 |
| 34 | 10639561 |
| 35 | 17123713 |
| 36 | 27559554 |
| 37 | 44355391 |
| 38 | 71387248 |
[1,1,2,4,6,10,17,27,45,72,116,187,302,486,782, 1259,2026,3261,5249,8449,13598,21885,35223,56690, 91239,146843,236336,380368,612178,985263,1585721, 2552119,4107478,6610731,10639561,17123713, 27559554,44355391,71387248] |