n | a(n) |
---|---|
0 | 1 |
1 | -4 |
2 | 4 |
3 | 0 |
4 | -48 |
5 | -960 |
6 | -20160 |
7 | -483840 |
8 | -13305600 |
9 | -415134720 |
10 | -14529715200 |
11 | -564583219200 |
12 | -24135932620800 |
13 | -1126343522304000 |
14 | -56992982228582400 |
15 | -3108708121559040000 |
16 | -181859425111203840000 |
17 | -11359219476176732160000 |
18 | -754576722346025779200000 |
[1,-4,4,0,-48,-960,-20160,-483840,-13305600, -415134720,-14529715200,-564583219200, -24135932620800,-1126343522304000, -56992982228582400,-3108708121559040000, -181859425111203840000,-11359219476176732160000, -754576722346025779200000] |