n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 16 |
5 | 75 |
6 | 384 |
7 | 1805 |
8 | 8640 |
9 | 42336 |
10 | 207368 |
11 | 995808 |
12 | 5184000 |
13 | 24192672 |
14 | 121730700 |
15 | 594350400 |
16 | 2921811200 |
[1,1,1,3,16,75,384,1805,8640,42336,207368,995808, 5184000,24192672,121730700,594350400,2921811200] |