n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 20 |
5 | 58 |
6 | 198 |
7 | 642 |
8 | 2350 |
9 | 8252 |
10 | 31002 |
11 | 114202 |
12 | 442764 |
13 | 1686722 |
14 | 6668388 |
15 | 26057670 |
16 | 104922324 |
17 | 417908598 |
18 | 1705897816 |
19 | 6903301784 |
20 | 28520655252 |
21 | 116886258244 |
22 | 487649280536 |
23 | 2020521857872 |
24 | 8502203299742 |
25 | 35550032694088 |
26 | 150682339656654 |
27 | 635129679380712 |
28 | 2709469220124966 |
[1,1,3,6,20,58,198,642,2350,8252,31002,114202, 442764,1686722,6668388,26057670,104922324, 417908598,1705897816,6903301784,28520655252, 116886258244,487649280536,2020521857872, 8502203299742,35550032694088,150682339656654, 635129679380712,2709469220124966] |