n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | -3 |
4 | 12 |
5 | -60 |
6 | 360 |
7 | -2520 |
8 | 20160 |
9 | -181440 |
10 | 1814400 |
11 | -19958400 |
12 | 239500800 |
13 | -3113510400 |
14 | 43589145600 |
15 | -653837184000 |
16 | 10461394944000 |
17 | -177843714048000 |
18 | 3201186852864000 |
19 | -60822550204416000 |
20 | 1216451004088320000 |
21 | -25545471085854720000 |
22 | 562000363888803840000 |
[1,0,1,-3,12,-60,360,-2520,20160,-181440,1814400, -19958400,239500800,-3113510400,43589145600, -653837184000,10461394944000,-177843714048000, 3201186852864000,-60822550204416000, 1216451004088320000,-25545471085854720000, 562000363888803840000] |