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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 120 |
| 6 | 720 |
| 7 | 5040 |
| 8 | 40320 |
| 9 | 362880 |
| 10 | 3432960 |
| 11 | 34680960 |
| 12 | 376399872 |
| 13 | 4421652960 |
| 14 | 55261084864 |
| 15 | 741613592784 |
| 16 | 10768723646848 |
[1,2,6,24,120,720,5040,40320,362880,3432960, 34680960,376399872,4421652960,55261084864, 741613592784,10768723646848] |