n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 4 |
3 | 8 |
4 | 16 |
5 | 0 |
6 | -480 |
7 | -5632 |
8 | -48896 |
9 | -355328 |
10 | -1901056 |
11 | 667648 |
12 | 238217216 |
13 | 4976025600 |
14 | 75193896960 |
15 | 911384117248 |
16 | 7730931236864 |
17 | -6549305294848 |
18 | -2307879895433216 |
19 | -69748749748928512 |
20 | -1498587541480669184 |
21 | -25307341803434803200 |
22 | -292113960612790272000 |
[0,2,4,8,16,0,-480,-5632,-48896,-355328,-1901056, 667648,238217216,4976025600,75193896960, 911384117248,7730931236864,-6549305294848, -2307879895433216,-69748749748928512, -1498587541480669184,-25307341803434803200, -292113960612790272000] |