%I A031348
%S A031348 0,7,6,6,3,5,5,4,5,1,1,7,6,6,3,5,5,4,5,1,7,6,5,4,2,4,5,3,4,1,6,5,5,
%T A031348 4,3,4,4,3,4,1,6,4,4,3,2,3,3,2,4,1,3,2,3,2,3,2,3,2,2,1,5,4,4,3,2,4,
%U A031348 5,2,4,1,5,5,4,3,3,5,2,5,4,1,4,3,3,2,2,2,5,2,3,1,5,4,4,4,2,4,4,3,3
%N A031348 2-multiplicative persistence: number of iterations of "multiply 2nd powers 
               of digits" needed to reach 0 or 1.
%H A031348 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               MultiplicativePersistence.html">Link to a section of The World of 
               Mathematics.</a>
%Y A031348 Sequence in context: A059751 A019859 A102769 this_sequence A109696 A110948 
               A103616
%Y A031348 Adjacent sequences: A031345 A031346 A031347 this_sequence A031349 A031350 
               A031351
%K A031348 nonn
%O A031348 0,2
%A A031348 Eric Weisstein (eric(AT)weisstein.com)