n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 20 |
4 | 400 |
5 | 16716 |
6 | 1444348 |
7 | 258951340 |
8 | 96266852004 |
9 | 74214689922928 |
10 | 118642250445743920 |
11 | 393305989512539553728 |
12 | 2703723885515478100466476 |
13 | 38542035415959856159523945096 |
[1,2,20,400,16716,1444348,258951340,96266852004, 74214689922928,118642250445743920, 393305989512539553728,2703723885515478100466476, 38542035415959856159523945096] |