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 A086480 #11 Jan 08 2020 17:49:52 %S A086480 4,8,12,1,125,24,343,2,1,40,1331,3,2197,56,3375 %N A086480 Erroneous version of A056135. %K A086480 dead %O A086480 0,1