n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 80 |
6 | 322 |
7 | 1348 |
8 | 5814 |
9 | 25674 |
10 | 115566 |
11 | 528528 |
12 | 2449746 |
13 | 11485068 |
14 | 54377288 |
15 | 259663576 |
16 | 1249249981 |
17 | 6049846848 |
18 | 29469261934 |
19 | 144293491564 |
20 | 709806846980 |
21 | 3506278661820 |
22 | 17385618278700 |
23 | 86500622296800 |
24 | 431718990188850 |
25 | 2160826237261692 |
[0,1,2,6,21,80,322,1348,5814,25674,115566,528528, 2449746,11485068,54377288,259663576,1249249981, 6049846848,29469261934,144293491564,709806846980, 3506278661820,17385618278700,86500622296800, 431718990188850,2160826237261692] |