n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | -3 |
5 | 0 |
6 | -12 |
7 | -12 |
8 | -36 |
9 | -108 |
10 | -210 |
11 | -480 |
12 | -1746 |
13 | -2340 |
14 | -10566 |
15 | -19500 |
16 | -53976 |
17 | -152604 |
18 | -329424 |
19 | -971304 |
20 | -2403291 |
21 | -5955576 |
22 | -16858584 |
23 | -40337376 |
24 | -110301321 |
25 | -287061696 |
26 | -730223208 |
27 | -1985703720 |
28 | -5070001716 |
[1,0,0,0,-3,0,-12,-12,-36,-108,-210,-480,-1746, -2340,-10566,-19500,-53976,-152604,-329424, -971304,-2403291,-5955576,-16858584,-40337376, -110301321,-287061696,-730223208,-1985703720, -5070001716] |