id:A048067 - 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-4)/2.

+0
1

0, 0, 0, 0, 0, 0, 0, 0, 0, 21, 28, 112, 144, 360, 450, 1110, 1430, 4235, 5775, 17556, 24388, 68328, 94731, 251160, 349300, 923230, 1301080, 3482710, 4976070, 13287846, 19136832, 50391978, 72898098 (list; graph; listen)

	OFFSET	`1,10`
	CROSSREFS	`Sequence in context: A009727 A048012 A130202 this_sequence A119107 A004196 A077787` `Adjacent sequences: A048064 A048065 A048066 this_sequence A048068 A048069 A048070`
	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