A031465 - OEIS

%I #9 Jul 04 2021 14:24:53

%S 256,512,1025,1026,1028,1032,1040,1056,1088,1152,1280,1536,2049,2050,

%T 2052,2056,2064,2080,2112,2176,2304,2560,3072,4099,4101,4102,4105,

%U 4106,4108,4113,4114,4116,4120,4129,4130,4132,4136,4144,4161

%N Numbers whose base-4 representation has 4 more 0's than 3's.

%H Harvey P. Dale, <a href="/A031465/b031465.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Range[4200],DigitCount[#,4,0]==DigitCount[#,4,3]+4&] (* _Harvey P. Dale_, Jun 05 2012 *)

%Y Cf. A007090.

%K nonn,base

%O 1,1

%A _Clark Kimberling_