Respuesta :

coralstoner
1,1, 2, 6, 24, 120, 270, and so on.

The next number is 120.

1x1 = 1
2x1 = 2
3x2 = 6
4x6 = 24 
5x24 = 120 
6x120= 720 
and so on.

You see the pattern. So, the series is 1, 1, 2, 6, 24, 120, 720, …
In general, the nth number is (n-1)!