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%I #2 Oct 02 2013 15:47:17
%S 120,5040,0,479001600,6402373705728000,121645100408832000,
%T 2432902008176640000,1124000727777607680000,
%U 15511210043330985984000000,304888344611713860501504000000
%N Smallest factorial containing exactly n 0's, or 0 if no such factorial exists.
%C a(3)=0 since no factorial can contain just three zeros.
%e a(2)=5040, so 5040 is the smallest factorial containing exactly two 0's.
%Y Cf. A072417.
%K base,nonn
%O 1,1
%A _Shyam Sunder Gupta_, Jul 31 2002