n | a(n) |
---|---|
0 | 1 |
1 | -21 |
2 | 189 |
3 | -952 |
4 | 3087 |
5 | -8400 |
6 | 27503 |
7 | -92907 |
8 | 246981 |
9 | -588490 |
10 | 1649823 |
11 | -4645179 |
12 | 10989769 |
13 | -25476717 |
14 | 65615424 |
15 | -161705810 |
16 | 363998754 |
17 | -834169539 |
18 | 1973130271 |
19 | -4510112565 |
20 | 9969930495 |
21 | -22054706773 |
[1,-21,189,-952,3087,-8400,27503,-92907,246981, -588490,1649823,-4645179,10989769,-25476717, 65615424,-161705810,363998754,-834169539, 1973130271,-4510112565,9969930495,-22054706773] |