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A048079 Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n+2)/3. 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 7, 8, 40, 45, 50, 150, 165, 180, 420, 455, 490, 1071, 1155, 1240, 3096, 3366, 3645, 10665, 11685, 12750, 37950, 41580, 45375, 126775, 138391, 150524, 398684, 433875, 470665, 1238601, 1347255, 1461278 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,10

LINKS

Table of n, a(n) for n=1..42.

CROSSREFS

Sequence in context: A048018 A254714 A047197 * A011346 A155525 A019741

Adjacent sequences:  A048076 A048077 A048078 * A048080 A048081 A048082

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified November 20 20:56 EST 2019. Contains 329347 sequences. (Running on oeis4.)