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, 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

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