n | a(n) |
---|---|
2 | 1 |
3 | 7 |
4 | 36 |
5 | 165 |
6 | 715 |
7 | 3003 |
8 | 12376 |
9 | 50388 |
10 | 203490 |
11 | 817190 |
12 | 3268760 |
13 | 13037895 |
14 | 51895935 |
15 | 206253075 |
16 | 818809200 |
17 | 3247943160 |
18 | 12875774670 |
19 | 51021117810 |
20 | 202112640600 |
21 | 800472431850 |
22 | 3169870830126 |
23 | 12551759587422 |
[1,7,36,165,715,3003,12376,50388,203490,817190, 3268760,13037895,51895935,206253075,818809200, 3247943160,12875774670,51021117810,202112640600, 800472431850,3169870830126,12551759587422] |