id:A047195 - OEIS Search Results

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Number of nonempty subsets of {1,2,...,n} in which exactly 2/3 of the elements are <= n/3.

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1

0, 0, 0, 0, 0, 4, 5, 6, 18, 21, 24, 76, 90, 105, 325, 385, 450, 1390, 1651, 1939, 6027, 7175, 8456, 26348, 31416, 37122, 116010, 138510, 164025, 513729, 614019, 728409, 2285569, 2734171, 3248322, 10208110, 12220780, 14536951 (list; graph; listen)

	OFFSET	`1,6`
	CROSSREFS	`Adjacent sequences: A047192 A047193 A047194 this_sequence A047196 A047197 A047198` `Sequence in context: A072564 A049899 A010753 this_sequence A109889 A103518 A103313`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

AT&T Labs Research