n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | -1 |
3 | 0 |
4 | -6 |
5 | 35 |
6 | -75 |
7 | 784 |
8 | -10052 |
9 | 61221 |
10 | -392445 |
11 | 6267976 |
12 | -85062714 |
13 | 868090431 |
14 | -10957052015 |
15 | 185215163288 |
16 | -2957955829800 |
17 | 45586843784873 |
18 | -803382792009849 |
19 | 15611619063139568 |
20 | -304944064099178510 |
[0,1,-1,0,-6,35,-75,784,-10052,61221,-392445, 6267976,-85062714,868090431,-10957052015, 185215163288,-2957955829800,45586843784873, -803382792009849,15611619063139568, -304944064099178510] |