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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 9 |
| 7 | 16 |
| 8 | 29 |
| 9 | 51 |
| 10 | 84 |
| 11 | 138 |
| 12 | 227 |
| 13 | 370 |
| 14 | 603 |
| 15 | 980 |
| 16 | 1589 |
| 17 | 2576 |
| 18 | 4172 |
| 19 | 6756 |
| 20 | 10936 |
| 21 | 17700 |
| 22 | 28646 |
| 23 | 46357 |
| 24 | 75013 |
| 25 | 121381 |
| 26 | 196405 |
[1,1,2,3,6,9,16,29,51,84,138,227,370,603,980,1589, 2576,4172,6756,10936,17700,28646,46357,75013, 121381,196405] |