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 A031093 #4 Mar 30 2012 18:56:20 %S A031093 5,19,37,55,73,82,84,86,88,90,91,92,94,96,98,109,127,145,168,195,222, %T A031093 249,276,289,292,295,298,301,303,304,307,310,313,330,357,384,411,438, %U A031093 465,492,519,532,535,538,541,544,546,547,550 %N A031093 Position of n-th 5 in A031087. %K A031093 nonn %O A031093 1,1 %A A031093 _Clark Kimberling_