id:A047173 - 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-1)/2.

+0
1

0, 0, 0, 0, 3, 4, 12, 15, 40, 51, 135, 175, 455, 596, 1540, 2037, 5250, 7000, 18000, 24156, 62007, 83667, 214467, 290719, 744315, 1012935, 2590679, 3537703, 9039823, 12381252, 31612324, 43411489, 110761494, 152459010 (list; graph; listen)

	OFFSET	`1,5`
	CROSSREFS	`Adjacent sequences: A047170 A047171 A047172 this_sequence A047174 A047175 A047176` `Sequence in context: A094025 A070287 A124637 this_sequence A116653 A122757 A084221`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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

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