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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 13 |
| 6 | 61 |
| 7 | 133 |
| 8 | 449 |
| 9 | 1825 |
| 10 | 11497 |
| 11 | 29905 |
| 12 | 121529 |
| 13 | 613121 |
| 14 | 3192553 |
| 15 | 26963653 |
| 16 | 76748369 |
| 17 | 367110269 |
| 18 | 2101537105 |
| 19 | 13742608029 |
| 20 | 90490605353 |
| 21 | 966603833657 |
| 22 | 2899027074937 |
| 23 | 15202727310033 |
| 24 | 102739122225929 |
| 25 | 738145449190921 |
| 26 | 6064931145859705 |
| 27 | 47996143247509851 |
| 28 | 637518525737986877 |
[1,1,1,3,5,13,61,133,449,1825,11497,29905,121529, 613121,3192553,26963653,76748369,367110269, 2101537105,13742608029,90490605353,966603833657, 2899027074937,15202727310033,102739122225929, 738145449190921,6064931145859705, 47996143247509851,637518525737986877] |