A045030 Numbers whose base-4 representation contains exactly three 0's and two 1's.

257, 260, 272, 320, 1030, 1031, 1033, 1037, 1042, 1043, 1048, 1052, 1057, 1060, 1073, 1076, 1090, 1091, 1096, 1100, 1120, 1136, 1153, 1156, 1168, 1217, 1220, 1232, 1282, 1283, 1288, 1292, 1312, 1328, 1408, 1472, 1537

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..5700

Mathematica

Select[Range[10000], DigitCount[#, 4, 0] == 3 && DigitCount[#, 4, 1] == 2 &] (* Vincenzo Librandi, Sep 22 2016 *)

Crossrefs

Cf. A007090.

Sequence in context: A260679 A043676 A296901 * A253149 A139653 A273551

Adjacent sequences: A045027 A045028 A045029 * A045031 A045032 A045033

Keyword

nonn,base

Author

Clark Kimberling

Status

approved