n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 4 |
3 | -6 |
4 | 51 |
5 | -180 |
6 | 1710 |
7 | -9450 |
8 | 105525 |
9 | -793800 |
10 | 10319400 |
11 | -98232750 |
12 | 1463667975 |
13 | -16856739900 |
14 | 283755121650 |
15 | -3834908327250 |
16 | 72041492147625 |
17 | -1117601855370000 |
18 | 23190238498927500 |
19 | -406108574195073750 |
[1,0,4,-6,51,-180,1710,-9450,105525,-793800, 10319400,-98232750,1463667975,-16856739900, 283755121650,-3834908327250,72041492147625, -1117601855370000,23190238498927500, -406108574195073750] |