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A045098 Numbers whose base-4 representation contains exactly two 1's and three 2's. 0

%I #13 May 16 2023 22:05:30

%S 362,410,422,425,602,614,617,662,665,677,1130,1178,1190,1193,1322,

%T 1418,1442,1448,1451,1454,1466,1514,1562,1574,1577,1610,1634,1640,

%U 1643,1646,1658,1670,1673,1682,1688,1691,1694,1697

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

%t Select[Range[1800],DigitCount[#,4,1]==2&&DigitCount[#,4,2]==3&] (* _Harvey P. Dale_, Sep 11 2011 *)

%Y Cf. A007090.

%K nonn,base

%O 1,1

%A _Clark Kimberling_

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Last modified August 27 01:48 EDT 2024. Contains 375462 sequences. (Running on oeis4.)