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 A253099 #7 Feb 23 2015 17:58:59 %S A253099 4,126,813,966,1166,1177,1666,1897,1974,2030,2041,2190,2349,2702,3299, %T A253099 3453,3695,4016,4140,4238,4278,4409,4784,4969,5102,5262,5274,5421, %U A253099 5536,5574,5587,5636,5650,5688,5790,5814,6269,6592,7015,7403,8137,8334,8536,8784,9443,9597,9839 %N A253099 Indices n>0 such that A083417(n) is zero. %H A253099 S. Wolfram, <a href="http://www.wolframscience.com/nksonline/page-907b-text">A New Kind of Science</a>, pages 907-908. %Y A253099 Cf. A083417. %K A253099 nonn %O A253099 1,1 %A A253099 _N. J. A. Sloane_, Feb 17 2015