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 A189666 #4 Mar 30 2012 18:57:25 %S A189666 2,6,8,11,14,18,20,24,26,29,33,35,38,42,44,47,50,54,56,60,62,65,68,72, %T A189666 74,78,80,83,87,89,92,95,99,101,105,107,110,114,116,119,122,126,128, %U A189666 132,134,137,141,143,146,150,152,155,158,162,164,168,170,173,176,180,182,186,188,191,195,197,200,204,206,209,212,216,218,222,224,227,230,234,236,240,242 %N A189666 Positions of 1 in A189664; complement of A189665. %C A189666 See A189664. %t A189666 (See A189664.) %Y A189666 Cf. A189664, A189665, A189667. %K A189666 nonn %O A189666 1,1 %A A189666 _Clark Kimberling_, Apr 25 2011