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Periods of sum of 5th powers of digits iterated until the sequence becomes periodic.
1

%I #14 Apr 15 2020 05:10:35

%S 1,1,12,22,4,10,22,28,10,22,1,12,22,28,12,22,6,10,22,28,12,22,28,12,

%T 22,28,10,22,28,12,22,28,12,22,28,10,22,4,12,22,4,12,22,28,10,22,28,

%U 10,22,28,10,22,28,10,22,4,12,22,28,12,22,6,10,22,28,12,22,28,10,22

%N Periods of sum of 5th 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