n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 20 |
4 | 396 |
5 | 14976 |
6 | 907200 |
7 | 79315200 |
8 | 9551001600 |
9 | 1513528934400 |
10 | 305106949324800 |
11 | 76296489615360000 |
12 | 23175289163980800000 |
13 | 8404709419090575360000 |
14 | 3587225703492542791680000 |
15 | 1779970753996760560435200000 |
16 | 1016036270188884847558656000000 |
17 | 661106386935312429191528448000000 |
[1,2,20,396,14976,907200,79315200,9551001600, 1513528934400,305106949324800,76296489615360000, 23175289163980800000,8404709419090575360000, 3587225703492542791680000, 1779970753996760560435200000, 1016036270188884847558656000000, 661106386935312429191528448000000] |