n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 42 |
6 | 132 |
7 | 429 |
8 | 1430 |
9 | 4862 |
10 | 16795 |
11 | 58784 |
12 | 207987 |
13 | 742760 |
14 | 2673592 |
15 | 9690220 |
16 | 35333404 |
17 | 129522165 |
18 | 477035494 |
19 | 1764359882 |
20 | 6550391672 |
21 | 24402303601 |
22 | 91188289504 |
23 | 341720434791 |
24 | 1283867554724 |
25 | 4834962472637 |
26 | 18247627360326 |
27 | 69005857450243 |
[1,1,2,5,14,42,132,429,1430,4862,16795,58784, 207987,742760,2673592,9690220,35333404,129522165, 477035494,1764359882,6550391672,24402303601, 91188289504,341720434791,1283867554724, 4834962472637,18247627360326,69005857450243] |