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A047197 Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= n/3. 0
0, 0, 0, 0, 0, 0, 0, 0, 6, 7, 8, 32, 36, 40, 100, 110, 120, 306, 338, 371, 1127, 1260, 1400, 4256, 4760, 5292, 15180, 16929, 18780, 53700, 59920, 66550, 195052, 218086, 242792, 716210, 801350, 892970, 2618486, 2929563, 3265171 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

LINKS

Table of n, a(n) for n=1..41.

CROSSREFS

Sequence in context: A112813 A048018 A254714 * A048079 A011346 A155525

Adjacent sequences:  A047194 A047195 A047196 * A047198 A047199 A047200

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified March 30 10:09 EDT 2020. Contains 333125 sequences. (Running on oeis4.)