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 A031083 #4 Mar 30 2012 18:56:20 %S A031083 6,22,40,58,76,94,99,101,103,105,107,109,111,112,113,115,130,148,173, %T A031083 200,227,254,281,308,316,319,322,325,328,331,334,335,337,340,362,389, %U A031083 416,443,470,497,524,551,559,562,565,568,571 %N A031083 Position of n-th 6 in A031076. %K A031083 nonn %O A031083 1,1 %A A031083 _Clark Kimberling_