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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 24 |
| 5 | 120 |
| 6 | 720 |
| 7 | 5040 |
| 8 | 40320 |
| 9 | 337920 |
| 10 | 3074400 |
| 11 | 30083040 |
| 12 | 318394848 |
| 13 | 3670837024 |
| 14 | 46156955440 |
| 15 | 601879734872 |
| 16 | 8464853630808 |
[1,2,6,24,120,720,5040,40320,337920,3074400, 30083040,318394848,3670837024,46156955440, 601879734872,8464853630808] |