n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | -36 |
4 | -96 |
5 | 450 |
6 | 1080 |
7 | -3920 |
8 | -8960 |
9 | 28350 |
10 | 63000 |
11 | -182952 |
12 | -399168 |
13 | 1093092 |
14 | 2354352 |
15 | -6177600 |
16 | -13178880 |
17 | 33474870 |
18 | 70887960 |
19 | -175518200 |
20 | -369512000 |
21 | 896251356 |
22 | 1877859984 |
23 | -4478082336 |
24 | -9345563136 |
25 | 21971267500 |
26 | 45700236400 |
27 | -106148523600 |
28 | -220159900800 |
[0,1,4,-36,-96,450,1080,-3920,-8960,28350,63000, -182952,-399168,1093092,2354352,-6177600, -13178880,33474870,70887960,-175518200,-369512000, 896251356,1877859984,-4478082336,-9345563136, 21971267500,45700236400,-106148523600, -220159900800] |