id:A028303 - OEIS Search Results

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Floor((1/(ceil(n/2)+1))*binomial(n,floor(n/2))) (interpolates between Catalan numbers).

+0
1

1, 0, 1, 1, 2, 2, 5, 7, 14, 21, 42, 66, 132, 214, 429, 715, 1430, 2431, 4862, 8398, 16796, 29393, 58786, 104006, 208012, 371450, 742900, 1337220, 2674440, 4847422, 9694845, 17678835, 35357670, 64822395 (list; graph; listen)

	OFFSET	`0,5`
	REFERENCES	`D. Miklos et al., eds., Combinatorics, Paul Erdos is Eighty, Bolyai Math. Soc., 1993, Vol. 1, p. 101.`
	CROSSREFS	`Sequence in context: A095326 A095330 A036378 this_sequence A047083 A035085 A127413` `Adjacent sequences: A028300 A028301 A028302 this_sequence A028304 A028305 A028306`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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