This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A163115 #16 Jan 22 2017 17:47:32
%S A163115 2,5,43,8219,36893488147419103363,38685626227668133590597803,
%T A163115 862718293348820473429344482784628181556388621521298319395315527975371
%N A163115 Primes of the form 2^n + 2*n + 1.
%C A163115 The corresponding values of n, i.e., 0, 1, 5, 13, 65, 85, 229, ... are of the form A192764() - 1. - _Juri-Stepan Gerasimov_, Jul 25 2011
%C A163115 The next term, a(8), has 604 digits. - _Harvey P. Dale_, Dec 17 2013
%e A163115 a(1) = 2^0 + 2*0 + 1 = 2.
%e A163115 a(2) = 2^1 + 2*1 + 1 = 5.
%e A163115 a(3) = 2^5 + 2*5 + 1 = 43.
%e A163115 a(4) = 2^13 + 2*13 + 1 = 8219.
%t A163115 Select[Table[2^n+2n+1,{n,0,300}],PrimeQ] (* _Harvey P. Dale_, Dec 17 2013 *)
%K A163115 nonn
%O A163115 1,1
%A A163115 _Juri-Stepan Gerasimov_, Jul 21 2009
%E A163115 13 removed, 3 terms added by _R. J. Mathar_, Jul 27 2009