A276108 Numbers expressible as perfect powers in a composite number of ways.

1, 65536, 43046721, 68719476736

Offset

1,2

Comments

Old title was "Values of A117453(n) such that A175066(n) is not a prime number."

Terms are 1, 2^16, 3^16, 2^36, ...

Numbers m^k, where m is not a perfect power and k is a composite number in A154893 or 0. - Charlie Neder, Mar 02 2019

Links

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

Example

65536 = 2^16 is a term because there are 4 corresponding ways that are 2^16, 4^8, 16^4, 256^2.

Crossrefs

Cf. A117453, A154893, A175066.

Sequence in context: A017696 A211199 A010804 * A030635 A236224 A016964

Adjacent sequences: A276105 A276106 A276107 * A276109 A276110 A276111

Keyword

nonn,more

Author

Altug Alkan, Aug 27 2016

Extensions

New title from Charlie Neder, Mar 04 2019

Status

approved