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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 7 |
| 8 | 9 |
| 9 | 14 |
| 10 | 22 |
| 11 | 33 |
| 12 | 47 |
| 13 | 77 |
| 14 | 112 |
| 15 | 170 |
| 16 | 251 |
| 17 | 384 |
| 18 | 571 |
| 19 | 855 |
| 20 | 1275 |
| 21 | 1919 |
| 22 | 2873 |
| 23 | 4305 |
| 24 | 6480 |
| 25 | 9706 |
| 26 | 14569 |
| 27 | 21861 |
| 28 | 32819 |
| 29 | 49201 |
| 30 | 73743 |
| 31 | 110619 |
| 32 | 165937 |
| 33 | 248848 |
| 34 | 373469 |
| 35 | 560078 |
| 36 | 840122 |
| 37 | 1260542 |
| 38 | 1890595 |
| 39 | 2835686 |
| 40 | 4253984 |
| 41 | 6380906 |
| 42 | 9571020 |
[1,0,0,2,3,5,7,9,14,22,33,47,77,112,170,251,384, 571,855,1275,1919,2873,4305,6480,9706,14569,21861, 32819,49201,73743,110619,165937,248848,373469, 560078,840122,1260542,1890595,2835686,4253984, 6380906,9571020] |