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 A023704 #12 Sep 13 2023 07:26:40 %S A023704 728,1457,1700,1943,2024,2105,2132,2159,2168,2177,2180,2183,2184,2185, %T A023704 2915,3644,3887,4130,4211,4292,4319,4346,4355,4364,4367,4370,4371, %U A023704 4372,4616,4859,4940,5021,5048,5075,5084,5093 %N A023704 Numbers with exactly 6 2's in their ternary expansion. %H A023704 Seiichi Manyama, <a href="/A023704/b023704.txt">Table of n, a(n) for n = 1..10000</a> %t A023704 Select[ Range[ 5103 ], (Count[ IntegerDigits[ #, 3 ], 2 ]==6)& ] %K A023704 nonn,base,easy %O A023704 1,1 %A A023704 _Olivier Gérard_