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A326507
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Number of (binary) max-heaps on n elements from the set {0,1} containing exactly six 0's.
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2
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1, 1, 2, 5, 9, 16, 27, 44, 68, 114, 156, 236, 325, 500, 622, 900, 1143, 1659, 1954, 2731, 3277, 4564, 5185, 7040, 8114, 10948, 12124, 16058, 17977, 23640, 25692, 33304, 36493, 46965, 50322, 64017, 69025, 87208, 92423, 115652, 123168, 153142, 160908, 198440
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OFFSET
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6,3
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LINKS
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Eric Weisstein's World of Mathematics, Heap
Index entries for linear recurrences with constant coefficients, signature (1, 2, -2, 3, -3, -8, 8, -2, 2, 12, -12, -2, 2, -8, 8, 3, -3, 2, -2, -1, 1).
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MATHEMATICA
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LinearRecurrence[{1, 2, -2, 3, -3, -8, 8, -2, 2, 12, -12, -2, 2, -8, 8, 3, -3, 2, -2, -1, 1}, {1, 1, 2, 5, 9, 16, 27, 44, 68, 114, 156, 236, 325, 500, 622, 900, 1143, 1659, 1954, 2731, 3277}, 50] (* Ray Chandler, Sep 25 2022 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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