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 A050093 #4 Mar 30 2012 18:57:00 %S A050093 1,3,8,5,13,21,2,18,7,26,15,81,34,4,67,12,31,20,53,64,9,133,28,252,17, %T A050093 61,72,6,130,36,249,25,152,58,14,163,343,80,33,282,462,22,221,55,509, %U A050093 66,232,376,11,88,135,351,30,41,146,19,398 %N A050093 a(n)=position of n in A050092. %K A050093 nonn %O A050093 1,2 %A A050093 _Clark Kimberling_