A044058 Numbers n such that string 2,0 occurs in the base 3 representation of n but not of n-1.

6, 15, 18, 24, 33, 42, 45, 51, 54, 69, 72, 78, 87, 96, 99, 105, 114, 123, 126, 132, 135, 150, 153, 159, 162, 195, 204, 207, 213, 216, 231, 234, 240, 249, 258, 261, 267, 276, 285, 288, 294, 297, 312, 315, 321, 330, 339, 342, 348

Offset

1,1

Links

Table of n, a(n) for n=1..49.

Mathematica

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 3], {2, 0}]>0, 1, 0], {n, 400}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, May 15 2019 *)

Crossrefs

Sequence in context: A105285 A138922 A362141 * A105139 A002599 A001484

Adjacent sequences: A044055 A044056 A044057 * A044059 A044060 A044061

Keyword

nonn,base

Author

Clark Kimberling

Status

approved