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 A030763 #4 Mar 30 2012 18:56:19 %S A030763 1,2,4,6,9,12,14,20,23,28,37,40,42,49,52,64,67,81,99,102,103,106,121, %T A030763 124,145,148,153,172,185,202,205,206,213,236,272,275,276,311,314,353, %U A030763 356,357,364,399,447,450,451,467,499,501,503 %N A030763 s(n)=1, where s=A030757. %K A030763 nonn %O A030763 1,2 %A A030763 _Clark Kimberling_