n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 6 |
5 | 30 |
6 | 180 |
7 | 1260 |
8 | 2520 |
9 | 2520 |
10 | 25200 |
11 | 277200 |
12 | 831600 |
13 | 10810800 |
14 | 151351200 |
15 | 2270268000 |
16 | 2270268000 |
17 | 38594556000 |
18 | 77189112000 |
19 | 1466593128000 |
20 | 7332965640000 |
21 | 153992278440000 |
22 | 3387830125680000 |
23 | 77920092890640000 |
24 | 467520557343840000 |
25 | 467520557343840000 |
[1,2,6,6,30,180,1260,2520,2520,25200,277200, 831600,10810800,151351200,2270268000,2270268000, 38594556000,77189112000,1466593128000, 7332965640000,153992278440000,3387830125680000, 77920092890640000,467520557343840000, 467520557343840000] |