A239524 Prime powers p (A025475) such that either d1 divides d2, or d2 divides d1, where d1 and d2 are the distances from p to the two nearest prime powers.

8, 9, 343, 361

Offset

1,1

Comments

Note the two nearest prime powers can be both above or both below p.

a(5) > 1.6*10^19. - Giovanni Resta, Mar 21 2014

Links

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

Crossrefs

Cf. A025475.

Sequence in context: A175849 A294468 A041605 * A115073 A298020 A042393

Adjacent sequences: A239521 A239522 A239523 * A239525 A239526 A239527

Keyword

nonn,hard,more

Author

Alex Ratushnyak, Mar 20 2014

Status

approved