A031491 - OEIS

%I #9 Jul 04 2021 17:45:23

%S 63,127,191,255,319,383,447,463,471,479,487,495,503,505,506,507,508,

%T 509,510,639,703,767,831,895,959,975,983,991,999,1007,1015,1017,1018,

%U 1019,1020,1021,1022

%N Numbers whose base-8 representation has 2 fewer 0's than 7's.

%t Select[Range[1100],DigitCount[#,8,7]==DigitCount[#,8,0]+2&] (* _Harvey P. Dale_, Mar 31 2018 *)

%Y Cf. A007094.

%K nonn,base

%O 1,1

%A _Clark Kimberling_