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 A077673 #4 May 11 2007 03:00:00 %S A077673 2,3,5,7,11,17,29,46,74,119,195,319,521,859,1407,2315,3810,6267,10303 %N A077673 Duplicate of A071255. %K A077673 dead %O A077673 1,1