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%I #4 Sep 16 2022 16:05:09
%S 31,991,1608145354351
%N Primes of the form (6^n + 5^n)/11.
%C The next term has 308 digits. - _Harvey P. Dale_, Sep 16 2022
%t a={}; Do[p=(6^n+5^n)/11; If[PrimeQ[p], AppendTo[a, p]], {n, 1, 12^2}];a
%t Select[Table[(6^n+5^n)/11,{n,20}],PrimeQ] (* _Harvey P. Dale_, Sep 16 2022 *)
%Y Cf. A128336.
%K nonn,bref
%O 1,1
%A _Vladimir Joseph Stephan Orlovsky_, May 16 2008