n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 53 |
6 | 214 |
7 | 958 |
8 | 4650 |
9 | 24103 |
10 | 131974 |
11 | 757011 |
12 | 4519321 |
13 | 27933252 |
14 | 177987808 |
15 | 1165057411 |
16 | 7811122974 |
17 | 53506838952 |
18 | 373693431140 |
19 | 2656088059747 |
20 | 19182588092365 |
21 | 140577110057850 |
22 | 1044102585724522 |
23 | 7851149068600037 |
24 | 59714190403840142 |
25 | 459001044591439621 |
[1,1,2,5,15,53,214,958,4650,24103,131974,757011, 4519321,27933252,177987808,1165057411,7811122974, 53506838952,373693431140,2656088059747, 19182588092365,140577110057850,1044102585724522, 7851149068600037,59714190403840142, 459001044591439621] |