n | a(n) |
---|---|
0 | 1 |
1 | 20 |
2 | 508 |
3 | 17400 |
4 | 788688 |
5 | 46032768 |
6 | 3372731136 |
7 | 303444195840 |
8 | 32898989030400 |
9 | 4229445205094400 |
10 | 635789661109862400 |
11 | 110396039984094412800 |
12 | 21901378996153294848000 |
13 | 4915686113045739601920000 |
[1,20,508,17400,788688,46032768,3372731136, 303444195840,32898989030400,4229445205094400, 635789661109862400,110396039984094412800, 21901378996153294848000,4915686113045739601920000] |