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 A141774 #11 Oct 16 2015 04:39:42
%S A141774 0,1,3,9,43,79,175,11325,13359,18577
%N A141774 Numbers n such that 2*11^n + 1 is prime.
%C A141774 a(11) > 2*10^5. - _Robert Price_, Oct 16 2015
%t A141774 Join[{0}, Select[Range[1, 175, 2], PrimeQ[2*11^# + 1] &]] (* _Arkadiusz Wesolowski_, Nov 06 2012 *)
%o A141774 (PARI) for(n=0, 1e5, if(isprime(2*11^n + 1), print1(n", "))) \\ _Altug Alkan_, Oct 16 2015
%Y A141774 Cf. A141798, A190942, A068231.
%K A141774 hard,nonn
%O A141774 1,3
%A A141774 _Rick L. Shepherd_, Jul 03 2008
%E A141774 a(8)-a(10) from _Arkadiusz Wesolowski_, Nov 06 2012