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A048064
Number of nonempty subsets of {1,2,...,n} in which exactly 3/4 of the elements are <= (n-4)/2.
0
0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 8, 32, 36, 90, 100, 245, 275, 770, 882, 2520, 2912, 7930, 9184, 24430, 28400, 76010, 88880, 239420, 281384, 755378, 890916, 2378103, 2813083
OFFSET
1,10
CROSSREFS
Sequence in context: A271901 A042875 A154745 * A122605 A037953 A296636
KEYWORD
nonn
STATUS
approved