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 A031120 #4 Mar 30 2012 18:56:21 %S A031120 5,16,22,25,39,59,73,84,86,91,94,106,116,133,137,143,159,160,163,166, %T A031120 167,202,221,225,237,240,243,260,263,320,329,333,341,349,351,365,376, %U A031120 381,396,400,407,408,410,416,422,432,436,440 %N A031120 Position of n-th 8 in A031111. %K A031120 nonn %O A031120 1,1 %A A031120 _Clark Kimberling_