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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 2 |
| 2 | 5 |
| 3 | 9 |
| 4 | 13 |
| 5 | 18 |
| 6 | 27 |
| 7 | 43 |
| 8 | 71 |
| 9 | 124 |
| 10 | 229 |
| 11 | 437 |
| 12 | 849 |
| 13 | 1670 |
| 14 | 3311 |
| 15 | 6591 |
| 16 | 13147 |
| 17 | 26256 |
| 18 | 52473 |
| 19 | 104905 |
| 20 | 209765 |
| 21 | 419482 |
| 22 | 838915 |
| 23 | 1677779 |
| 24 | 3355503 |
| 25 | 6710948 |
| 26 | 13421837 |
| 27 | 26843613 |
| 28 | 53687161 |
| 29 | 107374254 |
| 30 | 214748439 |
| 31 | 429496807 |
| 32 | 858993539 |
| 33 | 1717987000 |
| 34 | 3435973921 |
| 35 | 6871947761 |
[0,2,5,9,13,18,27,43,71,124,229,437,849,1670,3311, 6591,13147,26256,52473,104905,209765,419482, 838915,1677779,3355503,6710948,13421837,26843613, 53687161,107374254,214748439,429496807,858993539, 1717987000,3435973921,6871947761] |