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A048086
Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n+3)/3.
0
0, 0, 0, 0, 0, 3, 4, 5, 20, 24, 28, 70, 80, 90, 216, 245, 275, 770, 882, 1001, 2912, 3332, 3780, 10535, 11984, 13532, 37400, 42450, 47880, 135432, 153780, 173635, 497245, 564399, 637307, 1822106, 2065778, 2330900, 6665750
OFFSET
1,6
CROSSREFS
Sequence in context: A247573 A084930 A114336 * A048005 A334638 A039573
KEYWORD
nonn
STATUS
approved