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%I #4 Dec 06 2017 18:07:31
%S 6274633,3405994336744928448432949523054569,
%T 469545242509890879708897137286442565790534241
%N Primes of the form (13^n - 3^n)/10.
%C The next term (a(4)) has 299 digits. - _Harvey P. Dale_, Dec 06 2017
%t a={};Do[p=(13^n-3^n)/10;If[PrimeQ[p],AppendTo[a,p]],{n,1,16^2}];a
%t Select[Table[(13^n-3^n)/10,{n,300}],PrimeQ] (* _Harvey P. Dale_, Dec 06 2017 *)
%Y Cf. A128028.
%K nonn,bref
%O 1,1
%A _Vladimir Joseph Stephan Orlovsky_, May 16 2008
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