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%I #11 Apr 14 2020 19:57:29
%S 1,1,10,30,30,30,10,10,10,3,1,10,10,3,10,10,30,10,30,10,10,10,30,10,
%T 10,10,10,10,10,30,30,3,10,30,30,10,10,3,30,3,30,10,10,30,30,10,10,10,
%U 30,3,30,10,10,10,10,10,10,3,30,30,10,30,10,10,10,10,10,10,10,30
%N Periods of sum of 6th powers of digits iterated until the sequence becomes periodic.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Digitaddition.html">Digitaddition</a>
%K nonn,base
%O 0,3
%A _Eric W. Weisstein_
%E Missing a(0)=1 inserted by _Sean A. Irvine_, Apr 14 2020
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