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 A077935 #2 Sep 29 2006 03:00:00 %S A077935 1,2,6,18,52,152,444,1296,3784,11048,32256,94176,274960,802784,2343840 %N A077935 Duplicate of A077835. %K A077935 dead %O A077935 0,2