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

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