A039086 - OEIS

%I #13 Jun 25 2021 01:42:33

%S 0,2,3,5,6,7,8,13,18,20,21,23,24,25,26,27,29,30,32,33,34,35,37,45,47,

%T 48,50,51,52,53,54,56,57,59,60,61,62,63,65,66,68,69,70,71,72,74,75,77,

%U 78,79,80,85,103,112,117,119,120,122,123,124,125,130,139,148,157,162

%N Numbers whose base-9 representation has the same number of 1's and 4's.

%t Select[Range[0,200],DigitCount[#,9,1]==DigitCount[#,9,4]&] (* _Harvey P. Dale_, Dec 26 2014 *)

%Y Cf. A007095.

%K nonn,base,easy

%O 1,2

%A _Olivier Gérard_