n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 70 |
6 | 243 |
7 | 889 |
8 | 3276 |
9 | 12276 |
10 | 46435 |
11 | 176869 |
12 | 677022 |
13 | 2602197 |
14 | 10033212 |
15 | 38787495 |
16 | 150286400 |
17 | 583434322 |
18 | 2268848988 |
19 | 8836447021 |
20 | 34461894010 |
21 | 134564992002 |
22 | 526025788992 |
23 | 2058359779051 |
24 | 8061905110548 |
25 | 31602659997975 |
[1,1,2,6,20,70,243,889,3276,12276,46435,176869, 677022,2602197,10033212,38787495,150286400, 583434322,2268848988,8836447021,34461894010, 134564992002,526025788992,2058359779051, 8061905110548,31602659997975] |