A039102 - OEIS

%I #13 Jun 25 2021 01:41:36

%S 0,1,2,3,6,7,8,9,10,11,12,15,16,17,18,19,20,21,24,25,26,27,28,29,30,

%T 33,34,35,41,49,54,55,56,57,60,61,62,63,64,65,66,69,70,71,72,73,74,75,

%U 78,79,80,81,82,83,84,87,88,89,90,91,92,93,96,97,98,99,100,101,102

%N Numbers whose base-9 representation has the same number of 4's and 5's.

%t Select[Range[0,110],DigitCount[#,9,4]==DigitCount[#,9,5]&] (* _Harvey P. Dale_, Jul 21 2013 *)

%Y Cf. A007095.

%K nonn,base,easy

%O 1,3

%A _Olivier Gérard_