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%I #7 Sep 09 2017 11:43:12
%S 1,4,96,384,34560,4147200,23224320,6220800,99532800,1605264998400,
%T 10319560704000,52973744947200,2517312359890944000,137731736862720000,
%U 104125193068216320000,1039086126666344300544000000
%N Integers of the form phi(n!)/phi(n)!.
%t Select[Table[EulerPhi[n!]/EulerPhi[n]!,{n,50}],IntegerQ] //DeleteDuplicates (* _Harvey P. Dale_, Sep 09 2017 *)
%K easy,nonn
%O 1,2
%A _Benoit Cloitre_, Mar 17 2002
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