n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | -1 |
4 | -4 |
5 | -5 |
6 | -20 |
7 | 9 |
8 | -208 |
9 | 855 |
10 | -6180 |
11 | 41549 |
12 | -321792 |
13 | 2651155 |
14 | -23664420 |
15 | 225865769 |
16 | -2301032256 |
17 | 24901626095 |
18 | -285356879940 |
19 | 3451591584869 |
20 | -43947119045600 |
21 | 587529302036875 |
22 | -8228722825167940 |
23 | 120487046847246049 |
24 | -1840906518665985824 |
[1,1,0,-1,-4,-5,-20,9,-208,855,-6180,41549, -321792,2651155,-23664420,225865769,-2301032256, 24901626095,-285356879940,3451591584869, -43947119045600,587529302036875,-8228722825167940, 120487046847246049,-1840906518665985824] |