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 A026588 #6 May 11 2007 03:00:00 %S A026588 1,2,8,19,56,140,376,953,2474,6286,16097,40880,104069,264052 %N A026588 Duplicate of A026572. %K A026588 dead %O A026588 3,2