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 A039967 #41 Jan 25 2021 06:08:23 %S A039967 1,2,2,2,0,0,0,2,2,2,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,1,1,1,0,0,0, %T A039967 1,1,1,2,2,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, %U A039967 0,0,0,0,0,0,0,0,0,0,0,2,2,2,1,1,1,0,0,0,1,1,1,2,2,2,0,0,0,0,0,0,0,0,0,0,0 %N A039967 Duplicate of A039969. %K A039967 dead %O A039967 1,2