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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 120 |
| 6 | 720 |
| 7 | 5040 |
| 8 | 40320 |
| 9 | 339840 |
| 10 | 3151872 |
| 11 | 31926528 |
| 12 | 352423488 |
| 13 | 4218592000 |
| 14 | 54510747424 |
| 15 | 758539165904 |
| 16 | 11240098648736 |
[1,2,6,24,120,720,5040,40320,339840,3151872, 31926528,352423488,4218592000,54510747424, 758539165904,11240098648736] |