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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 5 |
| 5 | 10 |
| 6 | 19 |
| 7 | 34 |
| 8 | 64 |
| 9 | 129 |
| 10 | 267 |
| 11 | 541 |
| 12 | 1104 |
| 13 | 2253 |
| 14 | 4694 |
| 15 | 9804 |
| 16 | 18894 |
| 17 | 38539 |
| 18 | 76063 |
| 19 | 155241 |
| 20 | 311938 |
| 21 | 636120 |
| 22 | 1299869 |
| 23 | 2653853 |
| 24 | 5183363 |
| 25 | 10272289 |
| 26 | 20958448 |
| 27 | 40945577 |
| 28 | 81745769 |
| 29 | 167048919 |
| 30 | 329598054 |
| 31 | 671038751 |
| 32 | 1301431524 |
| 33 | 2618590422 |
| 34 | 5305742557 |
| 35 | 10582105199 |
| 36 | 20660489585 |
| 37 | 42075929255 |
| 38 | 85443680451 |
| 39 | 172057673225 |
| 40 | 338513788818 |
[0,1,2,4,5,10,19,34,64,129,267,541,1104,2253,4694, 9804,18894,38539,76063,155241,311938,636120, 1299869,2653853,5183363,10272289,20958448, 40945577,81745769,167048919,329598054,671038751, 1301431524,2618590422,5305742557,10582105199, 20660489585,42075929255,85443680451,172057673225, 338513788818] |