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A114911 a(n) is the largest base-9 string such that the n-th number coprime to 9 does not divide any substring of a(n). 1
7, 777, 8787, 886845, 7777777, 878754321, 8888787871, 887885887811, 8878878767816, 878787878787878, 8888888677748678, 888888887867751312, 8787878787873543211, 888878888387777136788, 8888888888486868617568 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..16.

EXAMPLE

a(3) = 777 (base 9) because the 3rd number coprime to 9 is 4, and 4 does not divide any substring of a(3).

CROSSREFS

Sequence in context: A242826 A112904 A137050 * A162089 A020470 A182282

Adjacent sequences: A114908 A114909 A114910 * A114912 A114913 A114914

KEYWORD

nonn,base

AUTHOR

Don Reble, Feb 20 2006

STATUS

approved

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Last modified December 6 21:00 EST 2022. Contains 358648 sequences. (Running on oeis4.)