n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 42 |
6 | 133 |
7 | 433 |
8 | 1455 |
9 | 4958 |
10 | 17247 |
11 | 60502 |
12 | 215353 |
13 | 770865 |
14 | 2789365 |
15 | 10134529 |
16 | 37130526 |
17 | 136451349 |
18 | 504837219 |
19 | 1872121732 |
20 | 6980767968 |
21 | 26078614284 |
22 | 97872756530 |
23 | 367861581953 |
24 | 1388061197005 |
25 | 5243972732886 |
[1,1,2,5,14,42,133,433,1455,4958,17247,60502, 215353,770865,2789365,10134529,37130526,136451349, 504837219,1872121732,6980767968,26078614284, 97872756530,367861581953,1388061197005, 5243972732886] |