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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 11 |
| 3 | 22 |
| 4 | 41 |
| 5 | 72 |
| 6 | 123 |
| 7 | 206 |
| 8 | 342 |
| 9 | 562 |
| 10 | 919 |
| 11 | 1497 |
| 12 | 2433 |
| 13 | 3948 |
| 14 | 6400 |
| 15 | 10368 |
| 16 | 16789 |
| 17 | 27179 |
| 18 | 43992 |
| 19 | 71196 |
| 20 | 115214 |
| 21 | 186437 |
| 22 | 301679 |
| 23 | 488145 |
| 24 | 789854 |
| 25 | 1278030 |
| 26 | 2067916 |
| 27 | 3345979 |
| 28 | 5413929 |
| 29 | 8759943 |
| 30 | 14173908 |
| 31 | 22933888 |
| 32 | 37107834 |
| 33 | 60041761 |
| 34 | 97149635 |
| 35 | 157191437 |
[1,4,11,22,41,72,123,206,342,562,919,1497,2433, 3948,6400,10368,16789,27179,43992,71196,115214, 186437,301679,488145,789854,1278030,2067916, 3345979,5413929,8759943,14173908,22933888, 37107834,60041761,97149635,157191437] |