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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 7 |
| 7 | 11 |
| 8 | 17 |
| 9 | 26 |
| 10 | 39 |
| 11 | 60 |
| 12 | 97 |
| 13 | 163 |
| 14 | 271 |
| 15 | 458 |
| 16 | 760 |
| 17 | 1255 |
| 18 | 2105 |
[1,2,3,4,5,7,11,17,26,39,60,97,163,271,458,760, 1255,2105] |