Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 4 |
3 | 12 |
4 | 60 |
5 | 360 |
6 | 2520 |
7 | 20160 |
8 | 181440 |
9 | 1814400 |
10 | 19958400 |
11 | 239500800 |
12 | 3113510400 |
13 | 43589145600 |
14 | 653837184000 |
15 | 10461394944000 |
16 | 177843714048000 |
17 | 3201186852864000 |
18 | 60822550204416000 |
19 | 1216451004088320000 |
20 | 25545471085854720000 |
21 | 562000363888803840000 |
[1,0,4,12,60,360,2520,20160,181440,1814400, 19958400,239500800,3113510400,43589145600, 653837184000,10461394944000,177843714048000, 3201186852864000,60822550204416000, 1216451004088320000,25545471085854720000, 562000363888803840000] |