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, 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

Links

Table of n, a(n) for n=1..4.

Crossrefs

Cf. A068890.

Sequence in context: A243010 A343427 A209040 * A337245 A073351 A195797

Adjacent sequences: A068888 A068889 A068890 * A068892 A068893 A068894

Keyword

base,fini,nonn

Author

Amarnath Murthy, Mar 20 2002

Status

approved