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 A050097 #4 Mar 30 2012 18:57:00 %S A050097 1,3,11,8,5,19,16,2,33,10,53,27,7,24,70,4,145,18,64,272,15,61,295,12, %T A050097 58,292,81,32,55,367,78,9,286,52,75,205,26,335,49,6,228,23,358,46,69, %U A050097 199,251,20,381,43,144,196,248,300,352,17,115,63 %N A050097 a(n)=position of n in A050096. %K A050097 nonn %O A050097 1,2 %A A050097 _Clark Kimberling_