n | a(n) |
---|---|
2 | 1 |
3 | -1 |
4 | 2 |
5 | -4 |
6 | 6 |
7 | -14 |
8 | 20 |
9 | -48 |
10 | 70 |
11 | -166 |
12 | 252 |
13 | -584 |
14 | 924 |
15 | -2092 |
16 | 3432 |
17 | -7616 |
18 | 12870 |
19 | -28102 |
20 | 48620 |
21 | -104824 |
22 | 184756 |
23 | -394404 |
24 | 705432 |
25 | -1494240 |
26 | 2704156 |
27 | -5692636 |
28 | 10400600 |
29 | -21785872 |
30 | 40116600 |
31 | -83688344 |
32 | 155117520 |
33 | -322494208 |
34 | 601080390 |
35 | -1246068806 |
36 | 2333606220 |
[1,-1,2,-4,6,-14,20,-48,70,-166,252,-584,924, -2092,3432,-7616,12870,-28102,48620,-104824, 184756,-394404,705432,-1494240,2704156,-5692636, 10400600,-21785872,40116600,-83688344,155117520, -322494208,601080390,-1246068806,2333606220] |