login

A280795 as a simple table

na(n)
12
2-4
3-4
4-64
5-1392
6-36048
7-68288
8217764736
945152039424
106761531610496
11479656304761728
12-181164506307765760
13-94510602811595547648
14-9099359091145965684736
1515760449987522859047213056
168420566548360384773538111488
17-5361092182457081839427169370112
18-9833526816807364784720991628738560
19595009928118250648162581567581609984

[2,-4,-4,-64,-1392,-36048,-68288,217764736,
 45152039424,6761531610496,479656304761728,
 -181164506307765760,-94510602811595547648,
 -9099359091145965684736,
 15760449987522859047213056,
 8420566548360384773538111488,
 -5361092182457081839427169370112,
 -9833526816807364784720991628738560,
 595009928118250648162581567581609984]