n | a(n) |
---|---|
0 | 1 |
1 | -15 |
2 | 105 |
3 | -470 |
4 | 1590 |
5 | -4593 |
6 | 12160 |
7 | -30075 |
8 | 69780 |
9 | -153750 |
10 | 325728 |
11 | -667020 |
12 | 1323915 |
13 | -2557140 |
14 | 4824630 |
15 | -8912759 |
16 | 16148505 |
17 | -28746945 |
18 | 50364835 |
19 | -86956260 |
20 | 148098384 |
21 | -249060745 |
22 | 413975085 |
23 | -680602545 |
[1,-15,105,-470,1590,-4593,12160,-30075,69780, -153750,325728,-667020,1323915,-2557140,4824630, -8912759,16148505,-28746945,50364835,-86956260, 148098384,-249060745,413975085,-680602545] |