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 A032849 #9 Feb 12 2021 20:53:09
%S A032849 1,3,6,7,12,13,15,24,26,27,30,31,48,49,52,53,55,60,61,63,96,98,99,104,
%T A032849 106,107,110,111,120,122,123,126,127,192,193,196,197,199,208,209,212,
%U A032849 213,215,220,221,223,240,241,244,245,247,252,253
%N A032849 Numbers whose base-2 representation Sum_{i=0..m} d(i)*2^i has d(m) <= d(m-1) >= d(m-2) <= ...
%K A032849 nonn,base
%O A032849 1,2
%A A032849 _Clark Kimberling_