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 A126361 #17 Sep 19 2015 17:34:56 %S A126361 1,7,19,53,149,421,1193,3387,9627,27383,77923,221805,631469,1797957, %T A126361 5119593,14578387,41514003,118218823,336653331,958698053,2730124261, %U A126361 7774706437,22140438345,63050541515,179552587883,511322221559 %N A126361 Duplicate of A002714. %K A126361 dead %O A126361 0,2