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A044148 Numbers n such that the string 1,3 occurs in the base 7 representation of n but not of n-1. 0
10, 59, 70, 108, 157, 206, 255, 304, 353, 402, 413, 451, 490, 549, 598, 647, 696, 745, 756, 794, 843, 892, 941, 990, 1039, 1088, 1099, 1137, 1186, 1235, 1284, 1333, 1382, 1431, 1442, 1480, 1529, 1578, 1627, 1676, 1725, 1774 (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], {1, 3}]>0, 1, 0], {n, 2000}], {0, 1}][[All, 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Apr 08 2018 *)

CROSSREFS

Sequence in context: A126730 A126478 A223470 * A044529 A129330 A045950

Adjacent sequences:  A044145 A044146 A044147 * A044149 A044150 A044151

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

EXTENSIONS

Definition reworded by Harvey P. Dale, Apr 08 2018

STATUS

approved

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Last modified October 21 08:47 EDT 2019. Contains 328292 sequences. (Running on oeis4.)