A023708 - OEIS

%I #15 Sep 13 2023 07:25:41

%S 64,128,192,257,258,259,260,264,268,272,288,304,320,384,448,513,514,

%T 515,516,520,524,528,544,560,576,640,704,769,770,771,772,776,780,784,

%U 800,816,832,896,960,1029,1030,1031,1033,1034,1035,1037,1038,1039,1041,1042

%N Numbers with exactly 3 0's in their base 4 expansion.

%H Seiichi Manyama, <a href="/A023708/b023708.txt">Table of n, a(n) for n = 1..10000</a>

%t Select[ Range[ 1152 ], (Count[ IntegerDigits[ #, 4 ], 0 ]==3)& ]

%K nonn,base,easy

%O 1,1

%A _Olivier Gérard_