n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 67 |
6 | 221 |
7 | 717 |
8 | 2294 |
9 | 7258 |
10 | 22760 |
11 | 70863 |
12 | 219353 |
13 | 675769 |
14 | 2073674 |
15 | 6342414 |
16 | 19345052 |
17 | 58867195 |
18 | 178779893 |
19 | 542042565 |
20 | 1641058046 |
21 | 4962262306 |
22 | 14989121072 |
23 | 45235277511 |
24 | 136407241265 |
25 | 411058035697 |
26 | 1237981634066 |
27 | 3726531171222 |
28 | 11212544793764 |
29 | 33723901952563 |
[1,1,2,6,20,67,221,717,2294,7258,22760,70863, 219353,675769,2073674,6342414,19345052,58867195, 178779893,542042565,1641058046,4962262306, 14989121072,45235277511,136407241265,411058035697, 1237981634066,3726531171222,11212544793764, 33723901952563] |