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Numbers whose base-4 representation contains exactly two 0's and one 3.
0

%I #10 May 24 2023 00:01:07

%S 48,67,76,112,131,140,176,193,194,196,200,208,224,263,267,269,270,275,

%T 284,291,300,305,306,308,312,323,332,368,387,396,432,449,450,452,456,

%U 464,480,519,523,525,526,531,540,547,556,561

%N Numbers whose base-4 representation contains exactly two 0's and one 3.

%t Select[Range[600],DigitCount[#,4,0]==2&&DigitCount[#,4,3]==1&] (* _Harvey P. Dale_, Sep 22 2016 *)

%Y Cf. A007090.

%K nonn,base

%O 1,1

%A _Clark Kimberling_