id:A047167 - 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.

+0
1

0, 0, 0, 0, 0, 3, 6, 24, 40, 100, 150, 315, 455, 980, 1470, 3528, 5544, 13692, 21630, 51600, 80520, 186945, 290400, 675675, 1056627, 2492919, 3929926, 9324406, 14742910, 34860553, 55107598, 129804808, 205272008, 483483128 (list; graph; listen)

	OFFSET	`1,6`
	CROSSREFS	`Sequence in context: A083525 A106213 A129520 this_sequence A054718 A109155 A081072` `Adjacent sequences: A047164 A047165 A047166 this_sequence A047168 A047169 A047170`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified September 6 16:00 EDT 2008. Contains 143483 sequences.

AT&T Labs Research