n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 2 |
3 | 4 |
4 | 10 |
5 | 28 |
6 | 79 |
7 | 235 |
8 | 720 |
9 | 2254 |
10 | 7146 |
11 | 22927 |
12 | 74137 |
13 | 241461 |
14 | 790838 |
15 | 2603210 |
16 | 8604861 |
17 | 28549166 |
18 | 95027832 |
19 | 317229779 |
20 | 1061764660 |
21 | 3562113987 |
22 | 11976146355 |
[1,2,2,4,10,28,79,235,720,2254,7146,22927,74137, 241461,790838,2603210,8604861,28549166,95027832, 317229779,1061764660,3562113987,11976146355] |