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A355097 as a simple table

na(n)
01
13
215
387
4414
5-333
6-36207
7-125415
89692208
965346480
10-6686193834
11-28979410023
129399236141664
13-74034590428035
14-21601690453093869
15753341807730002715
1664208547156310265880
17-6137571162315494165580
18-131200755856066508312736

[1,3,15,87,414,-333,-36207,-125415,9692208,
 65346480,-6686193834,-28979410023,9399236141664,
 -74034590428035,-21601690453093869,
 753341807730002715,64208547156310265880,
 -6137571162315494165580,-131200755856066508312736]