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%I #12 Apr 15 2020 05:10:56
%S 1,1,92,14,30,92,56,6,92,56,1,92,27,30,92,56,30,12,27,21,92,27,2,92,
%T 27,30,12,56,30,92,14,30,92,56,21,92,56,30,92,27,30,92,27,21,92,27,30,
%U 12,56,30,92,56,30,92,27,30,92,56,30,12,56,30,12,56,30,92,56,30
%N Periods of sum of 7th 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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