n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 15 |
3 | 391 |
4 | 14900 |
5 | 770596 |
6 | 51695280 |
7 | 4358885616 |
8 | 451036788480 |
9 | 56192122503936 |
10 | 8297504007091200 |
11 | 1433159145783936000 |
12 | 286297057932974899200 |
13 | 65505120288597559296000 |
[0,1,15,391,14900,770596,51695280,4358885616, 451036788480,56192122503936,8297504007091200, 1433159145783936000,286297057932974899200, 65505120288597559296000] |