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n!! mod n!
0

%I #4 Sep 07 2012 17:21:16

%S 0,0,0,3,8,15,48,105,384,945,3840,10395,46080,135135,645120,2027025,

%T 10321920,34459425,185794560,654729075,3715891200,13749310575,

%U 81749606400,316234143225,1961990553600,7905853580625,51011754393600,213458046676875,1428329123020800

%N n!! mod n!

%t Table[Mod[n!!,n!],{n, 0,30} ]

%Y Cf. A006882, A000142.

%K nonn

%O 0,4

%A _Michel Lagneau_, Sep 07 2012