Factorial	Number	Operation/Other Comments
0!	1
1!	1	1
2!	2	2*1
3!	6	3*2*1
4!	24	4*3*2*1
5!	120	5*4*3*2*1
6!	720	6*5*4*3*2*1
7!	5,040	7*6*5*4*3*2*1
8!	40,320	8*7*6*5*4*3*2*1
9!	362,880	9*8*7*6*5*4*3*2*1
10!	3,628,800	10*9*8*7*6*5*4*3*2*1
11!	39,916,800	you get the idea
12!	479,001,600
13!	6,227,020,800
14!	87,178,291,200
15!	1,307,674,368,000
16!	20,922,789,888,000
17!	355,687,428,096,000