%I #6 Mar 23 2024 03:28:16
%S 1,4,125,81
%N 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 Conjecture: the sequence is finite.
%C Certainly finite because a(10) does not exist (see A068890). - _Sean A. Irvine_, Mar 22 2024
%Y Cf. A068890.
%K base,fini,nonn
%O 1,2
%A _Amarnath Murthy_, Mar 20 2002