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 A159985 #12 Jun 02 2025 01:39:16 %S A159985 1,1,2,5,2,0,0,3,2,2,2,2,4 %N A159985 Erroneous version of A259667. %K A159985 dead %O A159985 0,3