n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 18 |
4 | 96 |
5 | 2880 |
6 | 518400 |
7 | 181440 |
8 | 135475200 |
9 | 8778792960 |
10 | 376233984000 |
11 | 72425041920000 |
12 | 4588850656051200 |
13 | 47345284546560000 |
14 | 217144413044342784000 |
15 | 42750306318104985600000 |
16 | 4974581098834034688000000 |
17 | 70875936417673484697600000 |
18 | 13663463022599094380003328000000 |
[1,4,18,96,2880,518400,181440,135475200, 8778792960,376233984000,72425041920000, 4588850656051200,47345284546560000, 217144413044342784000,42750306318104985600000, 4974581098834034688000000, 70875936417673484697600000, 13663463022599094380003328000000] |