A045092 - OEIS

%I #10 May 19 2023 19:54:17

%S 26,38,41,74,98,104,107,110,122,134,137,146,152,155,158,161,164,167,

%T 173,182,185,218,230,233,266,290,296,299,302,314,386,392,395,398,416,

%U 419,428,431,434,440,443,446,458,482,488,491,494

%N Numbers whose base-4 representation contains exactly one 1 and two 2's.

%t Select[Range[500],DigitCount[#,4,1]==1&&DigitCount[#,4,2]==2&] (* _Harvey P. Dale_, Jul 04 2013 *)

%Y Cf. A007090.

%K nonn,base

%O 1,1

%A _Clark Kimberling_