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A192574
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a(n) = sum(binomial(n,k)*floor(sqrt(Bell(k)))*floor(sqrt(Bell(n-k))),k=0..n).
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2
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1, 2, 4, 10, 28, 84, 282, 968, 3574, 13526, 53248, 215288, 889072, 3749808, 16120368, 70569136, 314384296, 1424490556, 6561255338, 30706715780, 145947430208, 704170163362, 3447329246534, 17116783509170, 86161074446406, 439511863198824, 2271055875812692
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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Table[Sum[Binomial[n, k]Floor[Sqrt[BellB[k]]]Floor[Sqrt[BellB[n-k]]], {k, 0, n}], {n, 0, 100}]
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PROG
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(Maxima) makelist(sum(binomial(n, k)*floor(sqrt(belln(k)))*floor(sqrt(belln(n-k))), k, 0, n), n, 0, 28);
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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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