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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
OFFSET
1,6
CROSSREFS
Sequence in context: A241608 A053162 A110804 * A007927 A284991 A327692
KEYWORD
nonn
STATUS
approved