A024505 - OEIS

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A024505

a(n) = [ C(2n,n)/2^(n+2) ].

0, 0, 0, 0, 1, 1, 3, 6, 12, 23, 45, 86, 165, 317, 612, 1183, 2292, 4451, 8654, 16853, 32865, 64165, 125414, 245375, 480526, 941832, 1847440, 3626457, 7123398, 14001162, 27535618, 54182991, 106672764, 210113021, 414046247, 816262602 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,7`
	CROSSREFS	`Sequence in context: A018180 A079735 A050243 * A005256 A097979 A173216` `Adjacent sequences: A024502 A024503 A024504 * A024506 A024507 A024508`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`
	EXTENSIONS	`More terms from James A. Sellers (sellersj(AT)math.psu.edu), Feb 06 2000`

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Last modified February 14 15:29 EST 2012. Contains 205631 sequences.