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A181859
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a(n) = gcd(n^2, n!) / gcd(n^2, n!/floor(n/2)!^2).
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1
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1, 1, 1, 1, 4, 1, 9, 1, 32, 9, 25, 1, 12, 1, 49, 5, 128, 1, 81, 1, 100, 21, 121, 1, 144, 25, 169, 27, 98, 1, 5, 1, 512, 11, 289, 7, 108, 1, 361, 13, 80, 1, 147, 1, 242, 3, 529, 1, 64, 49, 625, 17, 338, 1, 729, 55, 56, 57
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OFFSET
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0,5
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LINKS
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FORMULA
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MAPLE
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A181859 := n -> igcd(n^2, n!)/igcd(n^2, n!/iquo(n, 2)!^2);
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MATHEMATICA
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a[n_] := GCD[n^2, n!]/GCD[n^2, n!/Quotient[n, 2]!^2];
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PROG
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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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