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Numbers whose base-4 representation contains exactly two 0's and no 3's.
0

%I #10 May 24 2023 00:01:04

%S 16,32,65,66,68,72,80,96,129,130,132,136,144,160,261,262,265,266,273,

%T 274,276,280,289,290,292,296,321,322,324,328,336,352,385,386,388,392,

%U 400,416,517,518,521,522,529,530,532,536,545

%N Numbers whose base-4 representation contains exactly two 0's and no 3's.

%t Select[Range[600],DigitCount[#,4,0]==2&&DigitCount[#,4,3]==0&] (* _Harvey P. Dale_, Apr 07 2022 *)

%Y Cf. A007090.

%K nonn,base

%O 1,1

%A _Clark Kimberling_