A045073 - OEIS

%I #11 May 24 2023 00:01:11

%S 195,204,240,271,307,316,451,460,496,527,563,572,707,716,752,775,779,

%T 781,782,787,796,803,812,817,818,820,824,835,844,880,899,908,944,961,

%U 962,964,968,976,992,1055,1071,1079,1083,1085

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

%t Select[Range[1200],DigitCount[#,4,0]== DigitCount[#,4,3]==2&]  (* _Harvey P. Dale_, Mar 13 2011 *)

%Y Cf. A007090.

%K nonn,base

%O 1,1

%A _Clark Kimberling_