n | a(n) |
---|---|
1 | 3 |
2 | 1 |
3 | 6 |
4 | 37 |
5 | 234 |
6 | 1514 |
7 | 9996 |
8 | 67181 |
9 | 458562 |
10 | 3172478 |
11 | 22206420 |
12 | 157027938 |
13 | 1120292388 |
14 | 8055001716 |
15 | 58314533400 |
16 | 424740506109 |
17 | 3110401363122 |
18 | 22888001498102 |
19 | 169155516667524 |
20 | 1255072594261142 |
21 | 9345400450314924 |
[3,1,6,37,234,1514,9996,67181,458562,3172478, 22206420,157027938,1120292388,8055001716, 58314533400,424740506109,3110401363122, 22888001498102,169155516667524,1255072594261142, 9345400450314924] |