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A111974 as a simple table

na(n)
13
27
319
4163
5487
61459
739367
886093443
9258280327
10411782264189299
11116299474006080119380780339
123140085798164163223281069127
1384782316550432407028588866403
1420602102921755074907947094535687

[3,7,19,163,487,1459,39367,86093443,258280327,
 411782264189299,116299474006080119380780339,
 3140085798164163223281069127,
 84782316550432407028588866403,
 20602102921755074907947094535687]