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 A079509 #15 Feb 18 2023 08:28:12 %S A079509 0,2,5,9,14,20,27,35,44,54,65,77,90,104,119,135,152,170,189 %N A079509 Duplicate of A000096. %K A079509 dead %O A079509 0,2