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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 12 |
| 6 | 18 |
| 7 | 52 |
| 8 | 83 |
| 9 | 235 |
| 10 | 389 |
| 11 | 1087 |
| 12 | 1851 |
| 13 | 5113 |
| 14 | 8891 |
| 15 | 24357 |
| 16 | 43045 |
| 17 | 117127 |
| 18 | 209731 |
| 19 | 567487 |
| 20 | 1027245 |
| 21 | 2766404 |
| 22 | 5053521 |
| 23 | 13554315 |
| 24 | 24954627 |
| 25 | 66696366 |
| 26 | 123628610 |
| 27 | 329400200 |
| 28 | 614216837 |
| 29 | 1632039074 |
| 30 | 3059240151 |
| 31 | 8108703876 |
[1,1,3,4,12,18,52,83,235,389,1087,1851,5113,8891, 24357,43045,117127,209731,567487,1027245,2766404, 5053521,13554315,24954627,66696366,123628610, 329400200,614216837,1632039074,3059240151, 8108703876] |