n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 10 |
5 | 36 |
6 | 135 |
7 | 504 |
8 | 2000 |
9 | 8072 |
10 | 33099 |
11 | 138132 |
12 | 582930 |
13 | 2485412 |
14 | 10692219 |
15 | 46340984 |
16 | 202175344 |
17 | 887175352 |
18 | 3913032212 |
19 | 17338327848 |
20 | 77141235796 |
21 | 344491008296 |
22 | 1543591834950 |
23 | 6937783312048 |
24 | 31270131096820 |
25 | 141305878384704 |
26 | 640065923118435 |
27 | 2905664234243052 |
28 | 13217615913137250 |
[1,1,4,10,36,135,504,2000,8072,33099,138132, 582930,2485412,10692219,46340984,202175344, 887175352,3913032212,17338327848,77141235796, 344491008296,1543591834950,6937783312048, 31270131096820,141305878384704,640065923118435, 2905664234243052,13217615913137250] |