A137239 - OEIS

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A137239

a(n)= number of Catalan numbers with n digits.

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; 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: A071558 A179621 A136709 * A136714 A010314 A080133` `Adjacent sequences: A137236 A137237 A137238 * A137240 A137241 A137242`
	KEYWORD	`nonn,base,easy`
	AUTHOR	`Ctibor O. ZIZKA (ctibor.zizka(AT)seznam.cz), Mar 09 2008`
	EXTENSIONS	`Corrected and extended by Sean A. Irvine (sairvin(AT)xtra.co.nz), Feb 07 2010`

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Last modified February 16 20:47 EST 2012. Contains 205965 sequences.