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 A098675 #3 May 11 2007 03:00:00 %S A098675 41,241,1601,1609,2441,2969,3041,3449,3929,4001,4409,5009,6089,6521 %N A098675 Duplicate of A056213. %K A098675 dead %O A098675 1,1