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 A083317 #4 Feb 18 2023 08:28:09 %S A083317 3,4,8,10,12,13,19,24,25 %N A083317 Erroneous version of A005047. %D A083317 R. K. Guy, Unsolved Problems in Number Theory, E10. %K A083317 dead %O A083317 3,1