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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 15 |
| 6 | 44 |
| 7 | 91 |
| 8 | 314 |
| 9 | 717 |
| 10 | 2462 |
| 11 | 5786 |
| 12 | 20723 |
| 13 | 50596 |
| 14 | 188018 |
| 15 | 473183 |
| 16 | 1804072 |
| 17 | 4645335 |
| 18 | 17787660 |
| 19 | 46419584 |
| 20 | 181375177 |
| 21 | 481275126 |
| 22 | 1911271468 |
| 23 | 5141399599 |
| 24 | 20539168658 |
| 25 | 55762292565 |
| 26 | 224393416829 |
| 27 | 614548182426 |
| 28 | 2502149168249 |
| 29 | 6916703340431 |
| 30 | 28335787685261 |
| 31 | 78869864682145 |
| 32 | 324320769451124 |
[1,1,2,3,8,15,44,91,314,717,2462,5786,20723,50596, 188018,473183,1804072,4645335,17787660,46419584, 181375177,481275126,1911271468,5141399599, 20539168658,55762292565,224393416829,614548182426, 2502149168249,6916703340431,28335787685261, 78869864682145,324320769451124] |