n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | -1 |
4 | 9 |
5 | -25 |
6 | 235 |
7 | -1125 |
8 | 12145 |
9 | -83305 |
10 | 1037475 |
11 | -9280225 |
12 | 132009625 |
13 | -1456021125 |
14 | 23378099875 |
15 | -306453818125 |
16 | 5493040502625 |
17 | -83388492864625 |
18 | 1652566180607875 |
19 | -28500730684349625 |
20 | 619275939126495625 |
[1,0,1,-1,9,-25,235,-1125,12145,-83305,1037475, -9280225,132009625,-1456021125,23378099875, -306453818125,5493040502625,-83388492864625, 1652566180607875,-28500730684349625, 619275939126495625] |