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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 11 |
| 8 | 18 |
| 9 | 26 |
| 10 | 38 |
| 11 | 60 |
| 12 | 90 |
| 13 | 139 |
| 14 | 213 |
| 15 | 329 |
| 16 | 501 |
| 17 | 747 |
| 18 | 1144 |
| 19 | 1712 |
| 20 | 2548 |
| 21 | 3836 |
| 22 | 5732 |
| 23 | 8442 |
| 24 | 12654 |
| 25 | 18624 |
[1,2,2,4,5,6,11,18,26,38,60,90,139,213,329,501, 747,1144,1712,2548,3836,5732,8442,12654,18624] |