n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 4 |
4 | 12 |
5 | 60 |
6 | 240 |
7 | 720 |
8 | 7920 |
9 | 55440 |
10 | 1275120 |
11 | 16576560 |
12 | 480720240 |
13 | 19709529840 |
14 | 39419059680 |
15 | 197095298400 |
16 | 3350620072800 |
17 | 177582863858400 |
18 | 532748591575200 |
19 | 19711697888282400 |
20 | 59135093664847200 |
[1,2,4,12,60,240,720,7920,55440,1275120,16576560, 480720240,19709529840,39419059680,197095298400, 3350620072800,177582863858400,532748591575200, 19711697888282400,59135093664847200] |