n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 4 |
4 | 0 |
5 | 0 |
6 | -8 |
7 | 60 |
8 | -144 |
9 | 416 |
10 | -1248 |
11 | 4200 |
12 | -13248 |
13 | 42936 |
14 | -138072 |
15 | 452840 |
16 | -1480944 |
17 | 4883688 |
18 | -16114784 |
19 | 53457696 |
20 | -177637248 |
[0,0,4,0,0,-8,60,-144,416,-1248,4200,-13248,42936, -138072,452840,-1480944,4883688,-16114784, 53457696,-177637248] |