A044535 - OEIS

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A044535

Numbers n such that string 2,2 occurs in the base 7 representation of n but not of n+1.

16, 65, 118, 163, 212, 261, 310, 359, 408, 461, 506, 555, 604, 653, 702, 751, 832, 849, 898, 947, 996, 1045, 1094, 1147, 1192, 1241, 1290, 1339, 1388, 1437, 1490, 1535, 1584, 1633, 1682, 1731, 1780, 1833, 1878, 1927, 1976

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..41.

MATHEMATICA

Transpose[SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {2, 2}]>0, 1, 0], {n, 2000}], {1, 0}]][[1]] (* The program uses the SequencePosition and SequenceCount functions from Mathematica version 10 *) (* Harvey P. Dale, May 21 2015 *)

CROSSREFS

Sequence in context: A249689 A043402 A044154 * A034720 A232050 A119285

Adjacent sequences: A044532 A044533 A044534 * A044536 A044537 A044538

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved