Search: id:A031353
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%I A031353
%S A031353 0,4,3,3,3,3,3,2,3,1,1,4,3,3,3,3,3,2,3,1,4,3,3,2,2,2,2,3,2,1,3,3,3,
%T A031353 2,2,2,2,3,2,1,3,2,2,3,2,3,3,3,2,1,3,2,2,2,2,2,3,2,3,1,3,2,2,3,2,2,
%U A031353 2,2,2,1,3,2,2,3,3,2,2,2,2,1,2,3,3,3,2,2,2,2,2,1,3,2,2,2,3,2,2,2,3
%N A031353 7-multiplicative persistence: number of iterations of "multiply 7th powers 
               of digits" needed to reach 0 or 1.
%H A031353 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 A031353 Sequence in context: A117691 A143487 A031350 this_sequence A085415 A059124 
               A026858
%Y A031353 Adjacent sequences: A031350 A031351 A031352 this_sequence A031354 A031355 
               A031356
%K A031353 nonn
%O A031353 0,2
%A A031353 Eric Weisstein (eric(AT)weisstein.com)

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