A047197 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

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, 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: A347808 A048018 A254714 * A048079 A011346 A155525

Adjacent sequences: A047194 A047195 A047196 * A047198 A047199 A047200

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved