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A048067 Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= (n-4)/2. 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 21, 28, 112, 144, 360, 450, 1110, 1430, 4235, 5775, 17556, 24388, 68328, 94731, 251160, 349300, 923230, 1301080, 3482710, 4976070, 13287846, 19136832, 50391978, 72898098 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,10

LINKS

Table of n, a(n) for n=1..33.

CROSSREFS

Sequence in context: A276674 A130202 A162692 * A212192 A166647 A119107

Adjacent sequences:  A048064 A048065 A048066 * A048068 A048069 A048070

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified September 25 16:25 EDT 2017. Contains 292499 sequences.