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A112568 as a simple table

na(n)
11
23
313
461
5241
61051
75041
820161
991081
10392041
111681681
126530173
1327168961
14115590931

[1,3,13,61,241,1051,5041,20161,91081,392041,
 1681681,6530173,27168961,115590931]