Factorials table (n!)

Factorials are used eg. in probability (combinatorics) and set theory.

Example: 3! = 3 * 2 * 1

Factorials table (1-20)
Integer (n) Fact (n!)
1 1
2 2
3 6
4 24
5 120
6 720
7 5 040
8 40 320
9 362 880
10 3 628 800
11 39 916 800
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
18 6 402 373 705 728 000
19 121 645 100 408 832 000
20 2 432 902 008 176 640 000

More:
21! = 21 * 20!
22! = 22 * 21!
23! = 23 * 22!
...