id:A047183 - OEIS Search Results

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

+0
1

0, 0, 0, 3, 6, 13, 25, 45, 91, 154, 322, 525, 1125, 1793, 3921, 6153, 13671, 21206, 47718, 73359, 166800, 254607, 583947, 886171, 2047375, 3091971, 7188451, 10811671, 25272481, 37877401, 88959929, 132924649, 313498639 (list; graph; listen)

	OFFSET	`1,4`
	CROSSREFS	`Sequence in context: A032287 A006017 A147323 this_sequence A047194 A048039 A131913` `Adjacent sequences: A047180 A047181 A047182 this_sequence A047184 A047185 A047186`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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