n | a(n) |
---|---|
2 | 1 |
3 | -4 |
4 | 8 |
5 | -16 |
6 | 12 |
7 | -96 |
8 | -480 |
9 | -4672 |
10 | -45520 |
11 | -493120 |
12 | -5798912 |
13 | -73668608 |
14 | -1005335552 |
15 | -14671085568 |
16 | -228051746304 |
17 | -3762955404288 |
18 | -65707303602432 |
19 | -1210821292674048 |
20 | -23487031074109440 |
21 | -478463919131627520 |
22 | -10214440549929047040 |
23 | -228069193578011566080 |
[1,-4,8,-16,12,-96,-480,-4672,-45520,-493120, -5798912,-73668608,-1005335552,-14671085568, -228051746304,-3762955404288,-65707303602432, -1210821292674048,-23487031074109440, -478463919131627520,-10214440549929047040, -228069193578011566080] |