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A068339
n!^3 *sum{k=1 to n} mu(k)/k^3, where mu(k) is the Moebius function A008683.
0
1, 7, 181, 11584, 1434176, 311510016, 106474687488, 54515039993856, 39741464155521024, 39789248881360896000, 52911705535251480576000, 91431427164914558435328000, 200764942140996806158319616000
OFFSET
1,2
CROSSREFS
Sequence in context: A141983 A080484 A212944 * A219404 A202026 A302904
KEYWORD
nonn
AUTHOR
Leroy Quet, Feb 27 2002
STATUS
approved