id:A047200 - 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/3.

+0
2

0, 0, 0, 0, 0, 0, 0, 0, 15, 21, 28, 112, 144, 180, 450, 550, 660, 1815, 2275, 2821, 10192, 13230, 16940, 57680, 74256, 94248, 288456, 367080, 461700, 1427850, 1824690, 2310000, 7521360, 9684840, 12357532, 40225735, 51798175, 66098175 (list; graph; listen)

	OFFSET	`1,9`
	CROSSREFS	`Shares a bisection with A048045.` `Sequence in context: A082686 A102030 A026048 this_sequence A070537 A070005 A061346` `Adjacent sequences: A047197 A047198 A047199 this_sequence A047201 A047202 A047203`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

AT&T Labs Research