id:A048020 - OEIS Search Results

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

+0
1

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 9, 10, 40, 44, 48, 120, 130, 140, 371, 405, 440, 1400, 1547, 1701, 5292, 5852, 6440, 18780, 20734, 22792, 66550, 73600, 81080, 242792, 269225, 297440, 892970, 991314, 1096627, 3265171, 3626363 (list; graph; listen)

	OFFSET	`1,11`
	CROSSREFS	`Sequence in context: A135043 A054966 A130881 this_sequence A048000 A048081 A109936` `Adjacent sequences: A048017 A048018 A048019 this_sequence A048021 A048022 A048023`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

AT&T Labs Research