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 A032843 #9 Feb 12 2021 20:45:22
%S A032843 1,2,3,4,7,8,9,13,14,19,35,36,40,41,42,45,46,47,48,65,66,67,70,71,72,
%T A032843 73,95,96,97,98,176,177,178,179,182,183,184,201,202,203,204,207,208,
%U A032843 209,213,214,226,227,228,229,232,233,234,238,239
%N A032843 Numbers whose base-5 representation Sum_{i=0..m} d(i)*5^i has d(m) < d(m-1) > d(m-2) < ...
%K A032843 nonn,base
%O A032843 1,2
%A A032843 _Clark Kimberling_