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 A097577 #4 Nov 10 2007 03:00:00 %S A097577 1,2,4,2,10,8,2,26,30,12,2,70,104,60,16,2,192,350,260,100,20,2,534, %T A097577 1152 %N A097577 Duplicate of A097692. %K A097577 dead %O A097577 0,2