id:A048094 - OEIS Search Results

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

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0, 0, 1, 2, 6, 13, 25, 45, 91, 175, 322, 570, 975, 1617, 2607, 7425, 12753, 21385, 35065, 56302, 88638, 136986, 208050, 310840, 1251606, 1973706, 3065931, 4694921, 7092211, 10575635, 15576535, 22674015, 32637675, 46480475 (list; graph; listen)

	OFFSET	`1,4`
	CROSSREFS	`Sequence in context: A003600 A000135 A065220 this_sequence A031872 A124677 A034465` `Adjacent sequences: A048091 A048092 A048093 this_sequence A048095 A048096 A048097`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 6 13:45 EST 2009. Contains 170429 sequences.

AT&T Labs Research