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 A022781 #3 Mar 30 2012 18:55:50 %S A022781 1,4,10,18,29,43,59,78,100,124,151,181,213,248,286,326,369,414,462, %T A022781 513,566,622,681,742,806,873,942,1014,1089,1166,1246,1329,1414,1502, %U A022781 1592,1685,1781,1879,1980,2084,2190,2299,2411,2525,2642,2762,2884 %N A022781 Place where n-th 1 occurs in A023119. %K A022781 nonn %O A022781 1,2 %A A022781 _Clark Kimberling_