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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
1, 4, 125, 81
OFFSET
1,2
COMMENTS
Conjecture: the sequence is finite.
Certainly finite because a(10) does not exist (see A068890). - Sean A. Irvine, Mar 22 2024
CROSSREFS
Cf. A068890.
Sequence in context: A243010 A343427 A209040 * A337245 A073351 A195797
KEYWORD
base,fini,nonn
AUTHOR
Amarnath Murthy, Mar 20 2002
STATUS
approved