n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | -4 |
4 | -12 |
5 | -60 |
6 | -220 |
7 | -936 |
8 | -4092 |
9 | -17840 |
10 | -80868 |
11 | -356172 |
12 | -1640872 |
13 | -7433604 |
14 | -34541160 |
15 | -159080304 |
16 | -743832276 |
17 | -3469487112 |
18 | -16321682424 |
19 | -76796957940 |
20 | -363235185312 |
21 | -1720415299660 |
22 | -8176521038556 |
[1,0,0,-4,-12,-60,-220,-936,-4092,-17840,-80868, -356172,-1640872,-7433604,-34541160,-159080304, -743832276,-3469487112,-16321682424,-76796957940, -363235185312,-1720415299660,-8176521038556] |