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 A030783 #4 Mar 30 2012 18:56:19 %S A030783 2,4,6,11,12,16,19,23,24,32,33,43,45,56,58,71,73,88,91,107,127,149, %T A030783 154,173,178,179,200,216,230,232,236,237,240,265,267,272,303,305,311, %U A030783 344,346,351,388,390,434,436,483,485,491,535,537 %N A030783 s(k)=1, where s=A030777. %K A030783 nonn %O A030783 1,1 %A A030783 _Clark Kimberling_