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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. 1

%I

%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.

%Y Cf. A068890.

%K base,nonn

%O 1,2

%A _Amarnath Murthy_, Mar 20 2002

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Last modified October 5 11:53 EDT 2022. Contains 357255 sequences. (Running on oeis4.)