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 A137239 a(n)= number of Catalan numbers with n digits. 1
 4, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2, 2, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS J. Mulder, Table of n, a(n) for n = 1..12034 EXAMPLE 1-digit Catalan numbers are 1,1,2,5 so a(1)=4 2-digits Catalan numbers are 14,24 so a(2)=2 CROSSREFS Cf. A000108. Sequence in context: A282698 A136709 A254969 * A136714 A280135 A297825 Adjacent sequences:  A137236 A137237 A137238 * A137240 A137241 A137242 KEYWORD nonn,base,easy AUTHOR Ctibor O. Zizka, Mar 09 2008 EXTENSIONS Corrected and extended by Sean A. Irvine, Feb 07 2010 STATUS approved

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Last modified June 3 23:57 EDT 2020. Contains 334808 sequences. (Running on oeis4.)