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A013396 as a simple table

na(n)
01
10
20
3-90
4-3864
5-326214
6-33507276
7-4970687722
8-949869512144
9-236464361818318
10-73751391110641012
11-28454096973841135058
12-13304169550531141566328
13-7432891904926457008929270

[1,0,0,-90,-3864,-326214,-33507276,-4970687722,
 -949869512144,-236464361818318,-73751391110641012,
 -28454096973841135058,-13304169550531141566328,
 -7432891904926457008929270]