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A044142 Numbers n such that string 0,4 occurs in the base 7 representation of n but not of n-1. 0
53, 102, 151, 200, 249, 298, 347, 371, 396, 445, 494, 543, 592, 641, 690, 714, 739, 788, 837, 886, 935, 984, 1033, 1057, 1082, 1131, 1180, 1229, 1278, 1327, 1376, 1400, 1425, 1474, 1523, 1572, 1621, 1670, 1719, 1743, 1768, 1817 (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], {0, 4}]>0, 1, 0], {n, 2000}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jun 04 2019 *)

CROSSREFS

Sequence in context: A142296 A180520 A139959 * A044523 A063363 A288619

Adjacent sequences:  A044139 A044140 A044141 * A044143 A044144 A044145

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified August 18 22:58 EDT 2022. Contains 356215 sequences. (Running on oeis4.)