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 A086515 #16 Sep 29 2013 04:17:32 %S A086515 1,3,7,9,13,15,19,21,25,27,31,33,37,39,43,45,49,51,55,57,61,63,67,69, %T A086515 73,75,79,81,85,87,91,93,97,99,103,105,109,111,115,117,121,123,127, %U A086515 129,133,135,139,141,145,147,151,153,157,159,163,165,169,171,175,177,181,183 %N A086515 Duplicate of A047241. %K A086515 dead %O A086515 1,2