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| n | a(n) |
|---|---|
| 12 | 1 |
| 13 | 2 |
| 14 | 4 |
| 15 | 8 |
| 16 | 18 |
| 17 | 39 |
| 18 | 85 |
| 19 | 191 |
| 20 | 425 |
| 21 | 940 |
| 22 | 2185 |
| 23 | 5183 |
| 24 | 12814 |
| 25 | 32711 |
| 26 | 84715 |
| 27 | 218141 |
| 28 | 555741 |
| 29 | 1376723 |
| 30 | 3457106 |
| 31 | 9544621 |
| 32 | 26048861 |
| 33 | 72830491 |
| 34 | 202468765 |
| 35 | 591526393 |
| 36 | 1717701641 |
| 37 | 4994058475 |
| 38 | 14800573301 |
| 39 | 44137423952 |
| 40 | 133960953399 |
| 41 | 413431218250 |
| 42 | 1247184175056 |
| 43 | 3842131894125 |
[1,2,4,8,18,39,85,191,425,940,2185,5183,12814, 32711,84715,218141,555741,1376723,3457106,9544621, 26048861,72830491,202468765,591526393,1717701641, 4994058475,14800573301,44137423952,133960953399, 413431218250,1247184175056,3842131894125] |