n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 72 |
3 | 21600 |
4 | 190512000 |
5 | 580909190400000 |
6 | 428616352408083840000000 |
7 | 859278392084450410309036800000000000 |
8 | 2097197194438629126172451944256706311040000000000000 |
[1,4,72,21600,190512000,580909190400000, 428616352408083840000000, 859278392084450410309036800000000000, 20971971944386291261724519442567063110400000000000\ 00] |