n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | -1 |
3 | -4 |
4 | -15 |
5 | -56 |
6 | -185 |
7 | -204 |
8 | 6209 |
9 | 112400 |
10 | 1520271 |
11 | 19165420 |
12 | 237686449 |
13 | 2944654296 |
14 | 36392001815 |
15 | 441823808804 |
16 | 5066513855745 |
17 | 49021548330016 |
18 | 202510138910239 |
19 | -8592616658156580 |
20 | -399625593156546319 |
[1,0,-1,-4,-15,-56,-185,-204,6209,112400,1520271, 19165420,237686449,2944654296,36392001815, 441823808804,5066513855745,49021548330016, 202510138910239,-8592616658156580, -399625593156546319] |