n | a(n) |
---|---|
0 | 1 |
1 | -1 |
2 | -4 |
3 | -12 |
4 | -45 |
5 | -188 |
6 | -835 |
7 | -3849 |
8 | -18242 |
9 | -88265 |
10 | -434295 |
11 | -2165198 |
12 | -10915089 |
13 | -55534781 |
14 | -284708699 |
15 | -1470350760 |
16 | -7628363273 |
17 | -39878267745 |
18 | -208458228964 |
19 | -1103369168956 |
20 | -5771541600014 |
[1,-1,-4,-12,-45,-188,-835,-3849,-18242,-88265, -434295,-2165198,-10915089,-55534781,-284708699, -1470350760,-7628363273,-39878267745, -208458228964,-1103369168956,-5771541600014] |