%I A068891
%S A068891 1,4,125,81
%N A068891 a(1) = 1; a(n) = smallest nontrivial n-th power with property that digits 
               alternate in parity individually as well as in concatenation with 
               previous terms.
%C A068891 Conjecture: the sequence is finite.
%Y A068891 Cf. A068890.
%Y A068891 Sequence in context: A064681 A005936 A090082 this_sequence A073351 A068894 
               A116944
%Y A068891 Adjacent sequences: A068888 A068889 A068890 this_sequence A068892 A068893 
               A068894
%K A068891 base,nonn
%O A068891 1,2
%A A068891 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 20 2002