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A044561 Numbers n such that string 6,0 occurs in the base 7 representation of n but not of n+1. 0
42, 91, 140, 189, 238, 287, 300, 336, 385, 434, 483, 532, 581, 630, 643, 679, 728, 777, 826, 875, 924, 973, 986, 1022, 1071, 1120, 1169, 1218, 1267, 1316, 1329, 1365, 1414, 1463, 1512, 1561, 1610, 1659, 1672, 1708, 1757, 1806 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

MATHEMATICA

SequencePosition[Table[If[SequenceCount[IntegerDigits[n, 7], {6, 0}]>0, 1, 0], {n, 2000}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jan 28 2020 *)

CROSSREFS

Sequence in context: A301328 A067296 A044180 * A169680 A177772 A169738

Adjacent sequences:  A044558 A044559 A044560 * A044562 A044563 A044564

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 3 05:29 EST 2020. Contains 338899 sequences. (Running on oeis4.)