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 A119531 #11 Jan 21 2019 19:01:55 %S A119531 5,17,769,3489660929,112589990684262401,1945555039024054273, %T A119531 193428131138340667952988161 %N A119531 Primes in A000337. %C A119531 Next two terms are too big to include, see A128001. %F A119531 a(n) = A000337(A128001(n)). - R. J. Mathar, Oct 10 2011 %K A119531 nonn %O A119531 1,1 %A A119531 _Jorge Coveiro_, Jul 27 2006 %E A119531 Clearer (but incorrect) definition from R. J. Mathar, Jan 27 2008, corrected Oct 10 2011