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 A032886 #9 Feb 12 2021 21:37:34
%S A032886 1,2,3,4,5,6,7,14,15,21,22,23,28,29,30,31,35,36,37,38,39,42,43,44,45,
%T A032886 46,47,63,64,70,71,72,77,78,79,80,84,85,86,87,88,91,92,93,94,95,96,
%U A032886 119,120,121,126,127,128,129,133,134,135,136,137
%N A032886 Numbers whose base-7 representation Sum_{i=0..m} d(i)*7^i has d(0) < d(1) > d(2) < ...
%K A032886 nonn,base
%O A032886 1,2
%A A032886 _Clark Kimberling_