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 A276145 #17 Jun 22 2023 06:01:42 %S A276145 1,1,2,4,11,30,89,250,776,2236,7147,20979,68448 %N A276145 Duplicate of A063544. %K A276145 dead %O A276145 3,3