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 A032875 #9 Feb 12 2021 21:35:36
%S A032875 1,2,3,6,7,11,17,18,19,33,34,35,38,39,49,50,51,54,55,59,97,98,99,102,
%T A032875 103,113,114,115,118,119,123,177,178,179,182,183,187,273,274,275,289,
%U A032875 290,291,294,295,305,306,307,310,311,315,529,530
%N A032875 Numbers whose base-4 representation Sum_{i=0..m} d(i)*4^i has d(0) > d(1) < d(2) > ...
%K A032875 nonn,base
%O A032875 1,2
%A A032875 _Clark Kimberling_