n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 55 |
4 | 2008 |
5 | 153040 |
6 | 20933840 |
7 | 4662857360 |
8 | 1579060246400 |
9 | 772200774683520 |
10 | 523853880779443200 |
11 | 477360556805016931200 |
12 | 569060910292172349004800 |
13 | 868071731152923490921728000 |
14 | 1663043727673392444887284377600 |
15 | 3937477620391471128913917360384000 |
[1,1,4,55,2008,153040,20933840,4662857360, 1579060246400,772200774683520,523853880779443200, 477360556805016931200,569060910292172349004800, 868071731152923490921728000, 1663043727673392444887284377600, 3937477620391471128913917360384000] |