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%I #21 Mar 25 2018 10:26:49
%S 2,5,31,14348923,2954312706550833698689,
%T 66555937033867822607895549241096482953017615834735226281,
%U 7282483350946404208076885500996745047522350034970917293604274649554310785227
%N Primes of the form 3^k + k + 1.
%t Select[Table[3^n + n + 1, {n, 0, 150}], PrimeQ] (* _T. D. Noe_, Apr 25 2012 *)
%Y Cf. A061421, A301632.
%K nonn
%O 1,1
%A _Alex Ratushnyak_, Apr 25 2012
%E a(7) from _Seiichi Manyama_, Mar 25 2018
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