A048005 - OEIS

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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

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OFFSET

1,4

LINKS

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

CROSSREFS

Sequence in context: A084930 A114336 A048086 * A334638 A039573 A037347

Adjacent sequences: A048002 A048003 A048004 * A048006 A048007 A048008

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved