id:A048046 - OEIS Search Results

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Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n+1)/3.

+0
1

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 8, 9, 45, 50, 55, 165, 180, 195, 455, 490, 525, 1155, 1240, 1326, 3366, 3645, 3933, 11685, 12750, 13860, 41580, 45375, 49335, 138391, 150524, 163175, 433875, 470665, 509067, 1347255, 1461278, 1580761 (list; graph; listen)

	OFFSET	`1,11`
	CROSSREFS	`Sequence in context: A165480 A048029 A048009 this_sequence A048092 A105860 A096677` `Adjacent sequences: A048043 A048044 A048045 this_sequence A048047 A048048 A048049`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research