%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_
|