n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 62 |
6 | 298 |
7 | 1700 |
8 | 11448 |
9 | 88622 |
10 | 778532 |
11 | 7636888 |
12 | 82782697 |
13 | 981775224 |
14 | 12643542295 |
15 | 175638751080 |
16 | 2617558335383 |
17 | 41650633309937 |
18 | 704712768652527 |
19 | 12632584581030449 |
20 | 239150363847113653 |
21 | 4767657035201958150 |
[1,1,2,5,16,62,298,1700,11448,88622,778532, 7636888,82782697,981775224,12643542295, 175638751080,2617558335383,41650633309937, 704712768652527,12632584581030449, 239150363847113653,4767657035201958150] |