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 | 6 |
| 6 | 10 |
| 7 | 16 |
| 8 | 29 |
| 9 | 51 |
| 10 | 83 |
| 11 | 148 |
| 12 | 246 |
| 13 | 402 |
| 14 | 650 |
| 15 | 1084 |
| 16 | 1740 |
| 17 | 2803 |
| 18 | 4458 |
[1,1,1,2,3,6,10,16,29,51,83,148,246,402,650,1084, 1740,2803,4458] |