n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | -6 |
4 | 22 |
5 | -100 |
6 | 788 |
7 | -8568 |
8 | 103416 |
9 | -1307808 |
10 | 17722512 |
11 | -264361680 |
12 | 4373968080 |
13 | -79413478560 |
14 | 1558387903200 |
15 | -32713320769920 |
16 | 731007454396800 |
17 | -17347090012492800 |
18 | 436154519763744000 |
19 | -11585396062022112000 |
[0,0,2,-6,22,-100,788,-8568,103416,-1307808, 17722512,-264361680,4373968080,-79413478560, 1558387903200,-32713320769920,731007454396800, -17347090012492800,436154519763744000, -11585396062022112000] |