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A323966
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Number of defective (binary) heaps on n elements with exactly ten defects.
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2
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0, 19200, 947760, 49680576, 1744142400, 60169824000, 1646888944800, 42633973724160, 1013373907056960, 22797317814635520, 502986050203680000, 10556482426015426560, 222685725334400064000, 4535040919258899456000, 92995172484979478630400, 1880492299058130490163200
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OFFSET
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10,2
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COMMENTS
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Or number of permutations p of [n] having exactly ten indices i in {1,...,n} such that p(i) > p(floor(i/2)).
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LINKS
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Eric Weisstein's World of Mathematics, Heap
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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