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A044550 Numbers n such that string 4,3 occurs in the base 7 representation of n but not of n+1. 0
31, 80, 129, 178, 223, 227, 276, 325, 374, 423, 472, 521, 566, 570, 619, 668, 717, 766, 815, 864, 909, 913, 962, 1011, 1060, 1109, 1158, 1207, 1252, 1256, 1305, 1354, 1403, 1452, 1501, 1567, 1595, 1599, 1648, 1697, 1746, 1795 (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], {4, 3}]>0, 1, 0], {n, 2000}], {1, 0}][[All, 1]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 27 2020 *)

CROSSREFS

Sequence in context: A242777 A252231 A044169 * A055810 A142522 A005184

Adjacent sequences:  A044547 A044548 A044549 * A044551 A044552 A044553

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 23 21:55 EST 2021. Contains 340386 sequences. (Running on oeis4.)