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 A073769 #4 May 11 2007 03:00:00 %S A073769 0,1,2,4,8,15,28,52,96,177,326,600,1104,2031,3736,6872,12640,23249 %N A073769 Duplicate of A008937. %K A073769 dead %O A073769 0,3