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 A154700 #4 Mar 30 2012 17:26:28 %S A154700 3,5,7,13,19,37,73,109 %N A154700 Prime divisors of 2^36-1. %C A154700 Prime terms of A003543 (Divisors of 2^36 - 1). %t A154700 Select[Divisors[2^36-1],PrimeQ] %t A154700 (*or*)#[[1]]&/@FactorInteger[2^36-1] %Y A154700 A003543 %K A154700 fini,full,nonn,easy %O A154700 1,1 %A A154700 _Zak Seidov_, Jan 14 2009