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 A119747 #12 Apr 09 2016 10:59:26 %S A119747 1,5,1549,1771561 %N A119747 Odd numbers that are not the sum of a prime and a (nontrivial, positive) power. %C A119747 From a question raised by _Tanya Khovanova_. %H A119747 John Robertson, <a href="http://mathforum.org/kb/message.jspa?messageID=1676583">Integers of the form x^2+kp</a> (1999) %Y A119747 The odd terms of A119748. %K A119747 nonn,more %O A119747 1,2 %A A119747 _Max Alekseyev_, Jul 30 2006, Aug 28 2006