A225322 Lucky numbers that are prime powers.

1, 9, 25, 49, 169, 289, 361, 529, 729, 841, 961, 1369, 2187, 2209, 3481, 3721, 5041, 7921, 9409, 10609, 24649, 29791, 32041, 32761, 36481, 50653, 52441, 66049, 73441, 83521, 113569, 121801, 128881, 130321, 167281, 175561, 185761, 226981, 292681, 300763, 323761

Offset

1,2

Comments

Intersection of A025475 and A000959.

Conjecture: the sequence is infinite.

Links

Kevin P. Thompson, Table of n, a(n) for n = 1..1577 (terms < 10^10 with terms 1..628 from Donovan Johnson)

Crossrefs

Cf. A000959, A025475.

Cf. A031157, A031162, A057589, A118565, A128511.

Sequence in context: A297596 A266132 A112629 * A031162 A371085 A362971

Adjacent sequences: A225319 A225320 A225321 * A225323 A225324 A225325

Keyword

nonn

Author

Alex Ratushnyak, May 05 2013

Status

approved