n | a(n) |
---|---|
0 | 1 |
1 | -20 |
2 | 170 |
3 | -800 |
4 | 2415 |
5 | -6404 |
6 | 21550 |
7 | -71080 |
8 | 178295 |
9 | -419200 |
10 | 1203282 |
11 | -3294360 |
12 | 7476320 |
13 | -17381780 |
14 | 44919500 |
15 | -107605880 |
16 | 237628435 |
17 | -544086720 |
18 | 1273805460 |
19 | -2864694880 |
20 | 6256648862 |
21 | -13710129840 |
[1,-20,170,-800,2415,-6404,21550,-71080,178295, -419200,1203282,-3294360,7476320,-17381780, 44919500,-107605880,237628435,-544086720, 1273805460,-2864694880,6256648862,-13710129840] |