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 A057758 #5 Jan 09 2009 03:00:00 %S A057758 1,2,3,6,11,13,22,23,26,33,37,39,46,47,59,61,66,69,71,73,74,78,83 %N A057758 Duplicate of A057125. %K A057758 dead %O A057758 1,2