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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 7 |
| 6 | 12 |
| 7 | 22 |
| 8 | 39 |
| 9 | 69 |
| 10 | 124 |
| 11 | 222 |
| 12 | 398 |
| 13 | 717 |
| 14 | 1293 |
| 15 | 2336 |
| 16 | 4230 |
| 17 | 7671 |
| 18 | 13932 |
| 19 | 25340 |
| 20 | 46145 |
| 21 | 84125 |
| 22 | 153520 |
| 23 | 280408 |
| 24 | 512580 |
| 25 | 937653 |
| 26 | 1716313 |
| 27 | 3143362 |
| 28 | 5759816 |
| 29 | 10558795 |
| 30 | 19363764 |
| 31 | 35523470 |
| 32 | 65188915 |
| 33 | 119660129 |
| 34 | 219699380 |
| 35 | 403459270 |
| 36 | 741056490 |
[0,1,1,2,4,7,12,22,39,69,124,222,398,717,1293, 2336,4230,7671,13932,25340,46145,84125,153520, 280408,512580,937653,1716313,3143362,5759816, 10558795,19363764,35523470,65188915,119660129, 219699380,403459270,741056490] |