%I #6 Apr 09 2014 10:13:01

%S 1,7,181,11584,1434176,311510016,106474687488,54515039993856,

%T 39741464155521024,39789248881360896000,52911705535251480576000,

%U 91431427164914558435328000,200764942140996806158319616000

%N n!^3 *sum{k=1 to n} mu(k)/k^3, where mu(k) is the Moebius function A008683.

%K nonn

%O 1,2

%A _Leroy Quet_, Feb 27 2002