n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | -2 |
4 | 8 |
5 | 56 |
6 | -216 |
7 | -2344 |
8 | 12032 |
9 | 168640 |
10 | -1075328 |
11 | -18467712 |
12 | 140944000 |
13 | 2863703168 |
14 | -25464568832 |
15 | -597301399296 |
16 | 6065774456832 |
17 | 161295676067840 |
18 | -1842040163078144 |
19 | -54752864215838720 |
20 | 694620312112857088 |
[1,1,0,-2,8,56,-216,-2344,12032,168640,-1075328, -18467712,140944000,2863703168,-25464568832, -597301399296,6065774456832,161295676067840, -1842040163078144,-54752864215838720, 694620312112857088] |