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%I A274984 #11 Apr 02 2025 16:11:09 %S A274984 4,5,7,2,9,5,9,6 %N A274984 Outdated duplicate of A272005. %K A274984 dead %O A274984 2,1