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 A146886 #9 Feb 07 2019 14:57:20 %S A146886 1,2,4,6,10,12,16,18,22,28,30,36,40,42,46,52,58,60,66,70,72,78,82,88, %T A146886 96,100,102,106,108,112,126,130,136,138,148,150,156,162,166,172,178, %U A146886 180,190,192,196,198,210,222,226,228 %N A146886 Duplicate of A006093. %K A146886 dead %O A146886 1,2