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In mathematics, the factorial of a non-negative integer n,
denoted by n!, is the product of all positive integers less
than or equal to n. For example:
5! = 5 * 4 * 3 * 2 * 1 = 120
| n | n! |
|---|---|
| 0 | 1 |
| 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 |