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%I #9 Jul 31 2017 02:42:10
%S 1,4,8,14641,229345007,9474296896,886899938586555644327,
%T 1968149944695589999318735995870695144816896,
%U 29733387998758905886191953999849859976998299361889769463896694547608377966796875
%N a(1) = 1; for n > 1, the smallest n-th power with the digit sum also a nontrivial n-th power, i.e., 10^n is not a member.
%C Are there members with digit sum other than 2^n?
%e a(4) = 14641 because 14641 is 11^4 and its digit sum is 16, which is 2^4.
%Y Cf. A069648.
%K hard,nonn,base
%O 1,2
%A _Amarnath Murthy_, Apr 04 2002
%E Corrected and extended by _David Wasserman_, Apr 23 2003
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