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A048005 Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= (n-1)/3. 0
0, 0, 0, 3, 4, 5, 20, 27, 35, 119, 164, 219, 714, 1000, 1364, 4367, 6187, 8567, 27131, 38759, 54263, 170543, 245156, 346103, 1081574, 1562274, 2220074, 6906899, 10015004, 14307149, 44352164, 64512239, 92561039, 286097759 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..34.

CROSSREFS

Sequence in context: A084930 A114336 A048086 * A039573 A037347 A116474

Adjacent sequences:  A048002 A048003 A048004 * A048006 A048007 A048008

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 14 16:05 EDT 2020. Contains 335729 sequences. (Running on oeis4.)