A039562 Numbers whose base-4 representation has the same number of 1's, 2's and 3's.

0, 27, 30, 39, 45, 54, 57, 75, 78, 99, 108, 114, 120, 135, 141, 147, 156, 177, 180, 198, 201, 210, 216, 225, 228, 267, 270, 291, 300, 306, 312, 387, 396, 432, 450, 456, 480, 519, 525, 531, 540, 561, 564, 579, 588, 624, 705, 708, 720, 774, 777, 786, 792, 801

Offset: 1

Author

Olivier Gérard

Keywords

• nonn
• base
• easy

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A007090.

Programs

Mathematica

Select[Range[0,1000],Length[Union[Most[DigitCount[#,4]]]]==1&] (* Harvey P. Dale, Oct 04 2016 *)