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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
OFFSET
1,10
CROSSREFS
Sequence in context: A276674 A130202 A162692 * A344603 A212192 A166647
KEYWORD
nonn
STATUS
approved