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 A039013 #14 Jun 20 2021 14:57:16 %S A039013 0,1,4,5,6,9,13,17,20,21,24,25,26,29,30,31,34,38,42,45,46,49,53,58,65, %T A039013 66,69,73,77,82,85,86,89,97,100,101,104,105,106,109,113,117,120,121, %U A039013 124,125,126,129,130,131,134,138,142,145,146,149,150,151,154,155,156 %N A039013 Numbers whose base-5 representation has the same number of 2's and 3's. %H A039013 Daniel Starodubtsev, <a href="/A039013/b039013.txt">Table of n, a(n) for n = 1..10000</a> %t A039013 Select[Range[0,200],DigitCount[#,5,2]==DigitCount[#,5,3]&] (* _Harvey P. Dale_, Aug 27 2016 *) %Y A039013 Cf. A007091. %K A039013 nonn,base,easy %O A039013 1,3 %A A039013 _Olivier Gérard_