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A292220 as a simple table

na(n)
01
11
2-4
330
4-336
55040
6-95040
72162160
8-57657600
91764322560
10-60949324800
112346549004800
12-99638080819200
134626053752320000
14-233153109116928000
1512677700308232960000
16-739781100339240960000
1746113021921146019840000
18-3058021453718104473600000

[1,1,-4,30,-336,5040,-95040,2162160,-57657600,
 1764322560,-60949324800,2346549004800,
 -99638080819200,4626053752320000,
 -233153109116928000,12677700308232960000,
 -739781100339240960000,46113021921146019840000,
 -3058021453718104473600000]