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 A191201 #4 Mar 30 2012 18:57:31 %S A191201 1,4,7,13,16,19,22,31,40,43,55,58,67,70,79,91,94,121,124,127,151,163, %T A191201 166,175,178,202,205,223,235,238,271,274,283,286,319,364,367,379,382, %U A191201 394,487,490,499,502,511,526,529,607,610,637,655,667,670,703,706,715,718,811,814,823 %N A191201 Integers in (-3+A191138)/4; contains A191138 as a proper subsequence. %C A191201 See A191138. %t A191201 (See A191138.) %Y A191201 Cf. A191138, A191113. %K A191201 nonn %O A191201 1,2 %A A191201 _Clark Kimberling_, May 28 2011