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 A048207 #4 Mar 30 2012 18:56:54 %S A048207 1,1,2,1,1,2,3,1,2,1,3,4,2,1,1,1,3,2,4,5,1,1,3,2,1,1,4,1,5,6,2,3,1,1, %T A048207 1,1,4,1,3,1,5,1,6,7,3,1,4,1,1,1,2,5,1,2,4,6,1,7,8,1,2,1,5,1,1,4,2,6, %U A048207 2,1,2,7,3,8,9,5,1,2,3,1,1,2,1,6,1,1,3,5,7,1 %N A048207 a(n)=least m such that column m of T that contains n, array T given by A048201. %K A048207 nonn %O A048207 1,3 %A A048207 _Clark Kimberling_