n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 49 |
5 | 172 |
6 | 627 |
7 | 2364 |
8 | 9178 |
9 | 36322 |
10 | 146349 |
11 | 598798 |
12 | 2479100 |
13 | 10377197 |
14 | 43854651 |
15 | 186810219 |
16 | 801663799 |
17 | 3462831008 |
18 | 15043186516 |
19 | 65697663852 |
20 | 288296368358 |
21 | 1270513998501 |
22 | 5621498699217 |
23 | 24963796571708 |
24 | 111226042313882 |
25 | 497111195713677 |
26 | 2228180310648286 |
27 | 10013702555716602 |
[1,2,5,15,49,172,627,2364,9178,36322,146349, 598798,2479100,10377197,43854651,186810219, 801663799,3462831008,15043186516,65697663852, 288296368358,1270513998501,5621498699217, 24963796571708,111226042313882,497111195713677, 2228180310648286,10013702555716602] |