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 A023695 #12 Sep 13 2023 07:31:47 %S A023695 40,94,112,118,120,122,124,130,148,202,256,274,280,282,284,286,292, %T A023695 310,328,334,336,338,340,346,352,354,356,358,360,362,366,368,370,372, %U A023695 374,376,382,388,390,392,394,400,418,436,442 %N A023695 Numbers with exactly 4 1's in their ternary expansion. %H A023695 Seiichi Manyama, <a href="/A023695/b023695.txt">Table of n, a(n) for n = 1..10000</a> %t A023695 Select[ Range[ 459 ], (Count[ IntegerDigits[ #, 3 ], 1 ]==4)& ] %K A023695 nonn,base,easy %O A023695 1,1 %A A023695 _Olivier Gérard_