id:A048045 - 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+1)/3.

+0
2

0, 0, 0, 0, 0, 0, 0, 10, 15, 21, 84, 112, 144, 360, 450, 550, 1430, 1815, 2275, 7735, 10192, 13230, 44100, 57680, 74256, 223720, 288456, 367080, 1105800, 1427850, 1824690, 5784240, 7521360, 9684840, 30936334, 40225735, 51798175 (list; graph; listen)

	OFFSET	`1,8`
	CROSSREFS	`Shares a bisection with A047200.` `Sequence in context: A013638 A075524 A048028 this_sequence A115682 A075523 A115679` `Adjacent sequences: A048042 A048043 A048044 this_sequence A048046 A048047 A048048`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research