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A152287 as a simple table

na(n)
01
14
2-36
31584
4-165600
532619600
6-10679785200
75358907814400
8-3890309297817600
93912346626113721600
10-5268281311122784416000
119242007099323679696153600
12-20649044539048813400549836800

[1,4,-36,1584,-165600,32619600,-10679785200,
 5358907814400,-3890309297817600,
 3912346626113721600,-5268281311122784416000,
 9242007099323679696153600,
 -20649044539048813400549836800]