n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 15 |
4 | 79 |
5 | 466 |
6 | 2872 |
7 | 18409 |
8 | 121197 |
9 | 815491 |
10 | 5581214 |
11 | 38737651 |
12 | 272012178 |
13 | 1928939678 |
14 | 13794498614 |
15 | 99371002295 |
16 | 720411445866 |
17 | 5252194141946 |
18 | 38482834469488 |
19 | 283223825607253 |
20 | 2092829973445703 |
[1,1,3,15,79,466,2872,18409,121197,815491,5581214, 38737651,272012178,1928939678,13794498614, 99371002295,720411445866,5252194141946, 38482834469488,283223825607253,2092829973445703] |