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 A191166 #4 Mar 30 2012 18:57:30 %S A191166 1,2,3,4,5,7,8,11,14,19,20,23,27,31,32,36,41,43,55,56,59,68,75,79,80, %T A191166 91,92,95,100,107,122,123,127,128,163,164,167,171,176,203,219,223,224, %U A191166 228,235,236,239,271,272,275,284,292,299,315,319,320,363,365,367,368,379,380,383,420,427,484,487,488,491,500,507,511,512 %N A191166 Integers in (1+A191121)/3; contains A191121 as a proper subsequence. %C A191166 See A191113 and A191121. %t A191166 (See A191121.) %Y A191166 Cf. A191113, A191121. %K A191166 nonn %O A191166 1,2 %A A191166 _Clark Kimberling_, May 27 2011