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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 8 |
| 6 | 20 |
| 7 | 29 |
| 8 | 86 |
| 9 | 283 |
| 10 | 757 |
| 11 | 1199 |
| 12 | 2473 |
| 13 | 2733 |
| 14 | 24853 |
| 15 | 39629 |
| 16 | 53492 |
| 17 | 71237 |
| 18 | 72302 |
| 19 | 81653 |
| 20 | 167510 |
[1,2,3,5,8,20,29,86,283,757,1199,2473,2733,24853, 39629,53492,71237,72302,81653,167510] |