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A047200 Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= n/3. 1

%I

%S 0,0,0,0,0,0,0,0,15,21,28,112,144,180,450,550,660,1815,2275,2821,

%T 10192,13230,16940,57680,74256,94248,288456,367080,461700,1427850,

%U 1824690,2310000,7521360,9684840,12357532,40225735,51798175,66098175

%N Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= n/3.

%Y Shares a bisection with A048045.

%K nonn

%O 1,9

%A _Clark Kimberling_

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Last modified April 9 17:09 EDT 2020. Contains 333361 sequences. (Running on oeis4.)