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, 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

Links

Table of n, a(n) for n=1..39.

Crossrefs

Sequence in context: A247573 A084930 A114336 * A048005 A334638 A039573

Adjacent sequences: A048083 A048084 A048085 * A048087 A048088 A048089

Keyword

nonn

Author

Clark Kimberling

Status

approved