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A117443 as a simple table

na(n)
01
10
22
3-4
428
5-160
61272
7-11184
8114448
9-1309440
1016680992
11-233587264
123569157568
13-59075960320
141053056675712
15-20111857791744
16409715696197888
17-8868323731660800
18203247024658514432
19-4916860703228314624
20125206830774036241408
21-3347784042587048058880

[1,0,2,-4,28,-160,1272,-11184,114448,-1309440,
 16680992,-233587264,3569157568,-59075960320,
 1053056675712,-20111857791744,409715696197888,
 -8868323731660800,203247024658514432,
 -4916860703228314624,125206830774036241408,
 -3347784042587048058880]