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 A025312 #6 May 11 2007 03:00:00 %S A025312 65,85,125,130,145,170,185,205,221,250,260,265,290,305,325,340,365,370 %N A025312 Duplicate of A024508. %K A025312 dead %O A025312 1,1