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 A191271 #4 Mar 30 2012 18:57:31 %S A191271 8,16,29,37,50,55,63,71,84,92,105,110,118,126,139,152,160,173,181,194, %T A191271 199,207,215,228,236,249,254,262,270,283,296,304,317,325,338,343,351, %U A191271 359,372,377,385,393,406,414,427,432,440,448,461,469,482,487,495,503,516,529,537,550,558,571,576,584,592,605,613,626,631,639 %N A191271 Positions of 2 in A191269. %C A191271 See A191269. %t A191271 (See A191269.) %Y A191271 Cf. A191269, A191250. %K A191271 nonn %O A191271 1,1 %A A191271 _Clark Kimberling_, May 28 2011