A045024 - OEIS

%I #12 May 28 2023 22:19:57

%S 16,66,67,72,76,96,112,129,132,144,193,196,208,266,267,270,271,290,

%T 291,296,300,306,307,312,316,386,387,392,396,416,432,450,451,456,460,

%U 480,496,518,519,521,525,530,531,536,540,545,548

%N Numbers whose base-4 representation contains exactly two 0's and one 1.

%H Vincenzo Librandi, <a href="/A045024/b045024.txt">Table of n, a(n) for n = 1..1700</a>

%t Select[Range[8000], DigitCount[#, 4, 0] == 2 && DigitCount[#, 4, 1] == 1 &] (* _Vincenzo Librandi_, Sep 22 2016 *)

%Y Cf. A007090.

%K nonn,base

%O 1,1

%A _Clark Kimberling_