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 A191198 #4 Mar 30 2012 18:57:31 %S A191198 1,4,6,13,18,19,26,35,40,54,55,58,74,78,79,99,106,121,162,163,166,175, %T A191198 218,222,223,234,235,238,291,298,314,318,319,364,419,426,486,487,490, %U A191198 499,526,650,654,655,666,667,670,702,703,706,715,867,874,890,894,895,938,942,943,954,955,958,1093,1187,1194,1251,1258,1274,1278 %N A191198 Integers in (-1+A191137)/3; contains A191137 as a proper subsequence. %C A191198 See A191137. %t A191198 (See A191137.) %Y A191198 Cf. A191137, A191113. %K A191198 nonn %O A191198 1,2 %A A191198 _Clark Kimberling_, May 28 2011