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 A030784 #4 Mar 30 2012 18:56:19 %S A030784 3,9,18,25,28,34,35,44,57,60,72,75,89,92,108,111,128,131,150,174,181, %T A030784 201,205,207,208,231,266,269,274,275,278,304,307,313,345,348,389,392, %U A030784 397,435,438,441,484,487,536,539,547,557,594 %N A030784 s(n)=2, where s=A030777. %K A030784 nonn %O A030784 1,1 %A A030784 _Clark Kimberling_