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 A267651 #35 Mar 11 2023 08:38:50 %S A267651 6,6,30,6,30,30,54,6,102,30,78,30,78,54,150,6,102,102,126,30,270,78, %T A267651 150,30,150,78,318,54,174,150,198,6,390,102,270,102,222,126,390,30, %U A267651 246,270,270,78,510,150,294,30,390,150,510,78,318,318,390,54,630 %N A267651 Duplicate of A016725. %K A267651 dead %O A267651 1,1