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 A191267 #4 Mar 30 2012 18:57:31 %S A191267 3,6,12,15,21,24,26,29,32,38,41,47,50,52,55,58,64,67,73,79,82,88,91, %T A191267 97,100,102,105,108,114,117,123,126,128,131,134,140,143,149,155,158, %U A191267 164,167,173,176,178,181,184,190,193,199,202,204,207,210,216,219,221,224,227,233,236,242,245,247,250,253,259,262,268,271,273,276 %N A191267 Positions of 1 in A191265. %C A191267 See A191265. %t A191267 (See A191265.) %Y A191267 Cf. A191265, A191250. %K A191267 nonn %O A191267 1,1 %A A191267 _Clark Kimberling_, May 28 2011