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 A026191 #4 Mar 30 2012 18:56:05 %S A026191 2,1,6,3,10,4,5,16,18,7,22,8,9,28,30,11,34,12,13,40,14,15,46,48,17,52, %T A026191 54,19,58,20,21,64,66,23,70,24,25,76,26,27,82,84,29,88,90,31,94,32,33, %U A026191 100,102,35,106,36,37,112,38,39,118,120,41 %N A026191 Position of n in A026190. %K A026191 nonn %O A026191 1,1 %A A026191 _Clark Kimberling_