n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 80 |
6 | 384 |
7 | 2112 |
8 | 12992 |
9 | 94272 |
10 | 716800 |
11 | 6141440 |
12 | 58451568 |
13 | 596647568 |
14 | 6555879072 |
15 | 77766001056 |
16 | 981202169600 |
[1,2,6,20,80,384,2112,12992,94272,716800,6141440, 58451568,596647568,6555879072,77766001056, 981202169600] |