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A068339
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n!^3 *sum{k=1 to n} mu(k)/k^3, where mu(k) is the Moebius function A008683.
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0
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1, 7, 181, 11584, 1434176, 311510016, 106474687488, 54515039993856, 39741464155521024, 39789248881360896000, 52911705535251480576000, 91431427164914558435328000, 200764942140996806158319616000
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OFFSET
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1,2
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LINKS
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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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