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 A030753 #4 Mar 30 2012 18:56:19 %S A030753 2,3,6,16,29,30,39,49,50,62,75,77,92,94,113,133,152,155,173,178,181, %T A030753 204,207,210,238,241,271,274,307,310,344,348,384,388,426,432,472,475, %U A030753 476,480,528,531,581,584,631,636,638,641,697,700 %N A030753 s(k)=1, where s=A030747. %K A030753 nonn %O A030753 1,1 %A A030753 _Clark Kimberling_