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A047194 Number of nonempty subsets of {1,2,...,n} in which exactly 1/3 of the elements are <= n/3. +0
2
0, 0, 1, 3, 6, 13, 25, 45, 91, 175, 322, 645, 1245, 2325, 4651, 9031, 17061, 34123, 66547, 126763, 253527, 496063, 950818, 1901637, 3730293, 7184421, 14368843, 28243063, 54604081, 109208163, 215008363, 416990563, 833981127 (list; graph; listen)
OFFSET

1,4
CROSSREFS

Sequence in context: A006017 A147323 A047183 this_sequence A048039 A131913 A005406

Adjacent sequences: A047191 A047192 A047193 this_sequence A047195 A047196 A047197

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.

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