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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A154998 Primes p such that p^2 divides A048861((p-1)/2). 1
3, 2001907169 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No other terms below 10^11.

LINKS

Table of n, a(n) for n=1..2.

FORMULA

Elements of A125854 congruent to 1 or 3 modulo 8, i.e., primes p such that p == 1 or 3 (mod 8) and 2^(p-1) == 1+p (mod p^2).

PROG

(PARI) { forprime(p=3, 10^11, if(Mod((p-1)/2, p^2)^((p-1)/2)==1, print(p); )) }

CROSSREFS

A048861,A121999,A125854

Sequence in context: A081508 A067481 A058433 * A036236 A235357 A260002

Adjacent sequences:  A154995 A154996 A154997 * A154999 A155000 A155001

KEYWORD

bref,hard,more,nonn

AUTHOR

Max Alekseyev, Jan 18 2009

EXTENSIONS

Edited by Max Alekseyev, Oct 13 2009

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 April 18 15:02 EDT 2019. Contains 322209 sequences. (Running on oeis4.)