%I A072240
%S A072240 6,1307674368000,25852016738884976640000,403291461126605635584000000,
%T A072240 263130836933693530167218012160000000,
%U A072240 33452526613163807108170062053440751665152000000000
%N A072240 Smallest factorial containing exactly n 6's.
%e A072240 a(2)=1307674368000 so 1307674368000 is the smallest factorial containing 
               exactly two 6's.
%Y A072240 Sequence in context: A058431 A045518 A058457 this_sequence A079683 A115528 
               A106226
%Y A072240 Adjacent sequences: A072237 A072238 A072239 this_sequence A072241 A072242 
               A072243
%K A072240 base,nonn
%O A072240 1,1
%A A072240 Shyam Sunder Gupta (guptass(AT)rediffmail.com), Jul 30 2002