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%I #12 May 28 2023 22:19:24
%S 1,6,7,9,13,26,27,30,31,38,39,41,45,54,55,57,61,106,107,110,111,122,
%T 123,126,127,154,155,158,159,166,167,169,173,182,183,185,189,218,219,
%U 222,223,230,231,233,237,246,247,249,253,426,427
%N Numbers whose base-4 representation contains no 0's and exactly one 1.
%H Vincenzo Librandi, <a href="/A045014/b045014.txt">Table of n, a(n) for n = 1..1900</a>
%t Select[Range[700], DigitCount[#, 4, 0] == 0 && DigitCount[#, 4, 1] == 1 &] (* _Vincenzo Librandi_, Sep 21 2016 *)
%Y Cf. A007090.
%K nonn,base
%O 1,2
%A _Clark Kimberling_
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