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 A039572 #15 Feb 02 2025 11:45:35 %S A039572 0,1,5,6,25,26,30,31,69,73,89,97,113,117,125,126,130,131,150,151,155, %T A039572 156,194,198,214,222,238,242,269,273,294,298,329,334,345,346,353,358, %U A039572 365,366,389,397,414,422,429,434,445,446,477,482,485,486,513,517,538 %N A039572 Numbers whose base-5 representation has the same number of 2's, 3's and 4's. %H A039572 Harvey P. Dale, <a href="/A039572/b039572.txt">Table of n, a(n) for n = 1..1000</a> %t A039572 Select[Range[0,600],DigitCount[#,5,2]==DigitCount[#,5,3]==DigitCount[#,5,4]&] (* _Harvey P. Dale_, Feb 02 2025 *) %Y A039572 Cf. A007091. %K A039572 nonn,base,easy %O A039572 1,3 %A A039572 _Olivier Gérard_