id:A048023 - OEIS Search Results

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

+0
1

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 28, 36, 45, 180, 220, 264, 660, 780, 910, 2821, 3465, 4220, 16940, 21420, 26775, 94248, 118104, 146300, 461700, 574644, 708477, 2310000, 2899380, 3610540, 12357532, 15634300, 19623175, 66098175 (list; graph; listen)

	OFFSET	`1,11`
	CROSSREFS	`Sequence in context: A043170 A043950 A061900 this_sequence A105710 A080983 A096430` `Adjacent sequences: A048020 A048021 A048022 this_sequence A048024 A048025 A048026`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

AT&T Labs Research