A045031 Numbers whose base-4 representation contains exactly three 0's and three 1's.

1029, 1041, 1044, 1089, 1092, 1104, 1281, 1284, 1296, 1344, 4118, 4119, 4121, 4125, 4133, 4149, 4166, 4167, 4169, 4173, 4178, 4179, 4184, 4188, 4193, 4196, 4209, 4212, 4229, 4241, 4244, 4293, 4305, 4308, 4358, 4359

Offset

1,1

Links

Table of n, a(n) for n=1..36.

Mathematica

Select[Range[5000], DigitCount[#, 4, 0]==DigitCount[#, 4, 1]==3&] (* Harvey P. Dale, Aug 14 2015 *)

Crossrefs

Cf. A007090.

Sequence in context: A119455 A252772 A168189 * A250759 A260607 A298910

Adjacent sequences: A045028 A045029 A045030 * A045032 A045033 A045034

Keyword

nonn,base

Author

Clark Kimberling

Status

approved