n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 70 |
6 | 252 |
7 | 924 |
8 | 3432 |
9 | 12870 |
10 | 48619 |
11 | 184735 |
12 | 705222 |
13 | 2702609 |
14 | 10390940 |
15 | 40062132 |
16 | 154830696 |
17 | 599641425 |
18 | 2326640877 |
19 | 9042327525 |
20 | 35194002709 |
21 | 137160956815 |
22 | 535193552973 |
23 | 2090558951396 |
24 | 8174176541450 |
25 | 31990402045260 |
[1,2,6,20,70,252,924,3432,12870,48619,184735, 705222,2702609,10390940,40062132,154830696, 599641425,2326640877,9042327525,35194002709, 137160956815,535193552973,2090558951396, 8174176541450,31990402045260] |