n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 4 |
3 | 10 |
4 | 30 |
5 | 101 |
6 | 395 |
7 | 1769 |
8 | 9020 |
9 | 51674 |
10 | 328936 |
11 | 2303323 |
12 | 17595765 |
13 | 145622477 |
14 | 1297884212 |
15 | 12393874652 |
16 | 126242962310 |
17 | 1366268975165 |
18 | 15656289178423 |
19 | 189374961382141 |
20 | 2411196896699700 |
21 | 32235328003898918 |
22 | 451476237890591144 |
23 | 6610630095177242675 |
[1,2,4,10,30,101,395,1769,9020,51674,328936, 2303323,17595765,145622477,1297884212,12393874652, 126242962310,1366268975165,15656289178423, 189374961382141,2411196896699700, 32235328003898918,451476237890591144, 6610630095177242675] |