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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A128667 Primes p such that p^2 divides 13^(p-1) - 1. 8
2, 863, 1747591 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No further terms up to 3.127*10^13.

LINKS

Table of n, a(n) for n=1..3.

C. K. Caldwell, Fermat quotient

Richard Fischer, Fermat quotients B^(P-1) == 1 (mod P^2)

CROSSREFS

Cf. A001220, A014127, A123692, A123693, A128668, A090968, A128669, A039951

Sequence in context: A034227 A145748 A141185 * A199947 A230569 A239149

Adjacent sequences:  A128664 A128665 A128666 * A128668 A128669 A128670

KEYWORD

bref,hard,more,nonn

AUTHOR

Alexander Adamchuk, Mar 26 2007

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified October 22 11:23 EDT 2014. Contains 248397 sequences.