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 A191181 #4 Mar 30 2012 18:57:30 %S A191181 1,3,7,9,11,25,27,33,35,43,61,79,81,97,99,105,107,129,131,139,171,223, %T A191181 241,243,295,297,313,315,321,323,385,387,393,395,417,419,427,513,515, %U A191181 523,547,555,683,709,727,729,871,889,891,943,945,961,963,969,971,1159,1161,1177,1179,1185,1187,1249,1251,1257,1259,1281,1283 %N A191181 Integers in (1+A191128)/4; contains A191128 as a proper subsequence. %C A191181 See A191128. %t A191181 (See A191128.) %Y A191181 Cf. A191128, A191113. %K A191181 nonn %O A191181 1,2 %A A191181 _Clark Kimberling_, May 27 2011