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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 17 |
| 6 | 36 |
| 7 | 76 |
| 8 | 161 |
| 9 | 342 |
| 10 | 726 |
| 11 | 1542 |
| 12 | 3276 |
| 13 | 6960 |
| 14 | 14788 |
| 15 | 31422 |
| 16 | 66767 |
| 17 | 141872 |
| 18 | 301464 |
| 19 | 640584 |
| 20 | 1361188 |
| 21 | 2892417 |
| 22 | 6146164 |
| 23 | 13060136 |
| 24 | 27751818 |
| 25 | 58970564 |
| 26 | 125308114 |
| 27 | 266270558 |
| 28 | 565805452 |
| 29 | 1202295228 |
| 30 | 2554789536 |
| 31 | 5428741218 |
| 32 | 11535678790 |
| 33 | 24512475453 |
[1,1,2,4,8,17,36,76,161,342,726,1542,3276,6960, 14788,31422,66767,141872,301464,640584,1361188, 2892417,6146164,13060136,27751818,58970564, 125308114,266270558,565805452,1202295228, 2554789536,5428741218,11535678790,24512475453] |