%I A121105
%S A121105 679,378,168,48,32,6
%N A121105 Trajectory of 679 under "x -> product of digits of x" map.
%C A121105 This is the smallest number of persistence 5 (cf. A003001).
%H A121105 N. J. A. Sloane, <a href="http://www.research.att.com/~njas/doc/persistence.html">
               The persistence of a number</a>, J. Recreational Math., 6 (1973), 
               97-98.
%Y A121105 Cf. A003001.
%Y A121105 Sequence in context: A031524 A158385 A097771 this_sequence A046514 A164650 
               A097772
%Y A121105 Adjacent sequences: A121102 A121103 A121104 this_sequence A121106 A121107 
               A121108
%K A121105 nonn,fini,full
%O A121105 1,1
%A A121105 N. J. A. Sloane (njas(AT)research.att.com), Aug 12 2006