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 A191199 #4 Mar 30 2012 18:57:31 %S A191199 1,4,6,13,14,18,19,26,40,41,54,55,58,59,74,78,79,106,121,122,131,162, %T A191199 163,166,167,175,176,218,222,223,234,235,238,239,298,314,318,319,364, %U A191199 365,374,426,486,487,490,491,499,500,526,527,536,650,654,655,666,667,670,671,702,703,706,707,715,716,874 %N A191199 Integers in (-2+A191137)/4; contains A191137 as a proper subsequence. %C A191199 See A191137. %t A191199 (See A191137.) %Y A191199 Cf. A191137, A191113. %K A191199 nonn %O A191199 1,2 %A A191199 _Clark Kimberling_, May 28 2011