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 A083712 #2 Nov 10 2007 03:00:00 %S A083712 2,3,5,7,11,101,131,151,191,313,353,373,757,797,919,10301,10501,11311 %N A083712 Duplicate of A082806. %K A083712 dead %O A083712 1,1