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 A119626 #13 Dec 03 2014 22:56:59 %S A119626 6,12,30,84,246,732,2790,8364,25086,75252,225750,677264 %N A119626 Erroneous version of A178674. %K A119626 dead %O A119626 1,1