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A080397
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Largest squarefree number dividing central binomial coefficient A000984(n).
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3
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1, 2, 6, 10, 70, 42, 462, 858, 4290, 24310, 92378, 176358, 1352078, 520030, 222870, 6463230, 200360130, 129644790, 907513530, 1767263190, 22974421470, 134564468610, 526024740930, 22870640910, 1074920122770, 1504888171878
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OFFSET
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0,2
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LINKS
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FORMULA
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MAPLE
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a := n -> convert(numtheory:-factorset(binomial(2*n, n)), `*`):
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MATHEMATICA
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a[n_] := Times @@ FactorInteger[Binomial[2n, n]][[All, 1]]; Array[a, 26, 0] (* Jean-François Alcover, Jun 04 2019 *)
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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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