%I A031349
%S A031349 0,4,5,4,3,4,4,3,3,1,1,4,5,4,3,4,4,3,3,1,4,4,4,3,2,3,4,2,3,1,5,4,3,
%T A031349 3,4,3,4,3,4,1,4,3,3,2,2,3,3,3,3,1,3,2,4,2,3,2,3,2,3,1,4,3,3,3,2,3,
%U A031349 2,2,3,1,4,4,4,3,3,2,4,3,2,1,3,2,3,3,2,2,3,3,3,1,3,3,4,3,3,3,2,3,3
%N A031349 3-multiplicative persistence: number of iterations of "multiply 3rd powers 
               of digits" needed to reach 0 or 1.
%H A031349 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 A031349 Sequence in context: A071413 A161811 A016717 this_sequence A036444 A125583 
               A063694
%Y A031349 Adjacent sequences: A031346 A031347 A031348 this_sequence A031350 A031351 
               A031352
%K A031349 nonn
%O A031349 0,2
%A A031349 Eric Weisstein (eric(AT)weisstein.com)