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 A121994 Smallest natural number that yields a sequence of n decreasing numbers under the "Look and Say" operator A045918. 0
 1, 33, 333, 333111, 33333333333333333333333333333333311111111111 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS a(5) <= 33333333333333333333333333333333 '3's concatenated with 1111111111 '1's. - Tyler Busby, Feb 07 2023 LINKS Table of n, a(n) for n=0..4. Eric Weisstein's World of Mathematics, Look and Say. EXAMPLE 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 a(4) corrected by Tyler Busby, Feb 07 2023 STATUS approved

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Last modified September 26 00:10 EDT 2023. Contains 365649 sequences. (Running on oeis4.)