n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 40 |
4 | 860 |
5 | 63000 |
6 | 14714728 |
7 | 10562062112 |
8 | 22960880409360 |
9 | 150300904214651680 |
10 | 2955814683617734854752 |
11 | 174481716707875308905153664 |
12 | 30905247968182392588500030233024 |
[1,2,6,40,860,63000,14714728,10562062112, 22960880409360,150300904214651680, 2955814683617734854752, 174481716707875308905153664, 30905247968182392588500030233024] |