n | a(n) |
---|---|
1 | 5 |
2 | -15 |
3 | 40 |
4 | -150 |
5 | 624 |
6 | -2620 |
7 | 11160 |
8 | -48750 |
9 | 217000 |
10 | -976872 |
11 | 4438920 |
12 | -20343700 |
13 | 93900240 |
14 | -435970980 |
15 | 2034504992 |
16 | -9536718750 |
17 | 44878791360 |
18 | -211927733500 |
19 | 1003867701480 |
20 | -4768371093720 |
21 | 22706531339280 |
[5,-15,40,-150,624,-2620,11160,-48750,217000, -976872,4438920,-20343700,93900240,-435970980, 2034504992,-9536718750,44878791360,-211927733500, 1003867701480,-4768371093720,22706531339280] |