n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 49 |
6 | 178 |
7 | 663 |
8 | 2599 |
9 | 10464 |
10 | 43281 |
11 | 182870 |
12 | 786326 |
13 | 3432964 |
14 | 15178764 |
15 | 67856987 |
16 | 306252851 |
17 | 1393718374 |
18 | 6389136297 |
19 | 29478905335 |
20 | 136795502578 |
21 | 638051453583 |
22 | 2989741310540 |
23 | 14067166927596 |
24 | 66435732371659 |
25 | 314823825304590 |
26 | 1496481124834255 |
27 | 7133380580616379 |
28 | 34090715666725451 |
[1,1,2,5,15,49,178,663,2599,10464,43281,182870, 786326,3432964,15178764,67856987,306252851, 1393718374,6389136297,29478905335,136795502578, 638051453583,2989741310540,14067166927596, 66435732371659,314823825304590,1496481124834255, 7133380580616379,34090715666725451] |