n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 42 |
6 | 66 |
7 | 429 |
8 | 1430 |
9 | 4862 |
10 | 8398 |
11 | 58786 |
12 | 104006 |
13 | 74290 |
14 | 222870 |
15 | 3231615 |
16 | 11785890 |
17 | 129644790 |
18 | 47763870 |
19 | 1767263190 |
20 | 3282060210 |
21 | 12233133510 |
22 | 22870640910 |
23 | 22870640910 |
24 | 214984024554 |
25 | 115760628606 |
26 | 655976895434 |
27 | 34766775458002 |
28 | 65936987937590 |
[1,1,2,5,14,42,66,429,1430,4862,8398,58786,104006, 74290,222870,3231615,11785890,129644790,47763870, 1767263190,3282060210,12233133510,22870640910, 22870640910,214984024554,115760628606, 655976895434,34766775458002,65936987937590] |