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 A086481 #10 Feb 18 2023 08:27:37 %S A086481 4,8,12,9,125,24,343,18,16,40,1331,48,2197,56,3375 %N A086481 Erroneous version of A072905. %K A086481 dead %O A086481 0,1