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A039562
Numbers whose base-4 representation has the same number of 1's, 2's and 3's.
3
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
1,2
LINKS
MATHEMATICA
Select[Range[0, 1000], Length[Union[Most[DigitCount[#, 4]]]]==1&] (* Harvey P. Dale, Oct 04 2016 *)
CROSSREFS
Cf. A007090.
Sequence in context: A090043 A030491 A023742 * A160394 A316729 A095387
KEYWORD
nonn,base,easy
STATUS
approved