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A121994 Smallest number that yields a sequence of n decreasing numbers under the "Look and Say" operator A045918. 0
1, 33, 333, 333111, 3333333333333333333333333333333333111111111111 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..4.

Eric Weisstein's World of Mathematics, Look and Say.

EXAMPLE

E.g. "a(3)=333111 because under the Look and Say operator sequence A045918 it yields: 3331, 3311, 2321 which are all decreasing (3 in a row). The next term would be 12131211 which is greater than 2321"

CROSSREFS

Cf. A045918, A005150, A005341, A023989, A079475.

Sequence in context: A210070 A258638 A081932 * A093743 A279638 A209359

Adjacent sequences:  A121991 A121992 A121993 * A121995 A121996 A121997

KEYWORD

hard,more,nonn,base

AUTHOR

Sergio Pimentel, Sep 11 2006

EXTENSIONS

a(4) from Sergio Pimentel, Mar 05 2008

STATUS

approved

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Last modified June 7 01:26 EDT 2020. Contains 334836 sequences. (Running on oeis4.)