id:A048062 - 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-4)/2.

+0
1

0, 0, 0, 0, 0, 0, 0, 6, 7, 21, 24, 76, 90, 270, 325, 945, 1155, 3311, 4102, 11611, 14547, 40755, 51555, 143227, 182703, 503943, 647548, 1775092, 2295646, 6259162, 8141055, 22092135, 28881463 (list; graph; listen)

	OFFSET	`1,8`
	CROSSREFS	`Sequence in context: A041771 A042757 A062369 this_sequence A081284 A099572 A110928` `Adjacent sequences: A048059 A048060 A048061 this_sequence A048063 A048064 A048065`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.

AT&T Labs Research