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 A146166 #33 Jun 02 2025 00:42:18 %S A146166 15,21,33,35,39,51,55,57,65,69,77,85,87,91,93,95 %N A146166 Duplicate of A046388. %K A146166 dead %O A146166 1,1