id:A048000 - OEIS Search Results

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Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= n/3.

+0
1

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 9, 10, 50, 55, 60, 180, 195, 210, 490, 525, 560, 1240, 1326, 1413, 3645, 3933, 4230, 12750, 13860, 15015, 45375, 49335, 53460, 150524, 163175, 176345, 470665, 509067, 549094, 1461278, 1580761 (list; graph; listen)

	OFFSET	`1,12`
	CROSSREFS	`Sequence in context: A054966 A130881 A048020 this_sequence A048081 A109936 A114460` `Adjacent sequences: A047997 A047998 A047999 this_sequence A048001 A048002 A048003`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research