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 A131177 #37 Jun 02 2025 00:31:43 %S A131177 1,4,11,23,41,67,102,147,204,274,358,458,575,710,865,1041,1239,1461 %N A131177 Duplicate of A092498. %K A131177 dead %O A131177 1,2