login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A096059 Numbers n such that for all k, (n^k-1)/(n-1) is not prime. 1
9, 25, 32, 49, 64, 81, 121, 125, 144 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Indices of 0 in A084740.

Possibly a subset of A001597.

The first unknown value is n=152, checked up to k = prime(1100). - Derek Orr, Nov 29 2014

It is known 169, 216, 225, 243, 289, 324, 343 are also members of this sequence. - Derek Orr, Nov 29 2014

LINKS

Table of n, a(n) for n=1..9.

CROSSREFS

Cf. A001597, A084738, A084740.

Sequence in context: A076486 A270337 A068529 * A246328 A065772 A305755

Adjacent sequences:  A096056 A096057 A096058 * A096060 A096061 A096062

KEYWORD

nonn,more

AUTHOR

Amarnath Murthy, Jun 17 2004

EXTENSIONS

Edited by Don Reble, Mar 19 2007

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 20 19:57 EDT 2019. Contains 321349 sequences. (Running on oeis4.)