n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 40 |
4 | 12096 |
5 | 604800 |
6 | 760320 |
7 | 217945728000 |
8 | 697426329600 |
9 | 16937496576000 |
10 | 30964207376793600 |
11 | 187333454629601280000 |
12 | 111407096483020800000 |
13 | 1814811575069725360128000000 |
14 | 10162944820390462016716800000 |
[1,4,40,12096,604800,760320,217945728000, 697426329600,16937496576000,30964207376793600, 187333454629601280000,111407096483020800000, 1814811575069725360128000000, 10162944820390462016716800000] |