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 A061284 #4 May 11 2007 03:00:00 %S A061284 1,2,4,8,6,32,64,12,256,512,24,2048,36,30,16384,32768,96,72,262144,192 %N A061284 Duplicate of A016017. %K A061284 dead %O A061284 1,2