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A048063 Number of nonempty subsets of {1,2,...,n} in which exactly 1/4 of the elements are <= (n-4)/2. 0
0, 0, 0, 0, 0, 10, 20, 41, 77, 126, 252, 392, 844, 1270, 2800, 4070, 9020, 12782, 28679, 40022, 91286, 126048, 291018, 398125, 926177, 1256717, 2942192, 3965620, 9343948, 12526280, 29689088, 39617627, 94363367 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..33.

CROSSREFS

Sequence in context: A241608 A053162 A110804 * A007927 A284991 A327692

Adjacent sequences:  A048060 A048061 A048062 * A048064 A048065 A048066

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 31 08:46 EDT 2020. Contains 338101 sequences. (Running on oeis4.)