login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A040128 Primes p such that x^4 = 14 has a solution mod p. 2
2, 7, 11, 13, 31, 43, 47, 67, 103, 107, 113, 137, 157, 163, 167, 173, 179, 181, 199, 211, 223, 229, 269, 271, 311, 331, 347, 349, 367, 379, 383, 397, 401, 439, 443, 461, 479, 491, 499, 503, 509, 547, 569, 571 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

ok [p_]:=Reduce[Mod[x^4 - 14, p]== 0, x, Integers]=!= False; Select[Prime[Range[180]], ok] (* Vincenzo Librandi, Sep 12 2012 *)

PROG

(MAGMA) [p: p in PrimesUpTo(800) | exists(t){x : x in ResidueClassRing(p) | x^4 eq 14}]; // Vincenzo Librandi, Sep 12 2012

CROSSREFS

Sequence in context: A339862 A045370 A117048 * A209630 A235266 A140548

Adjacent sequences:  A040125 A040126 A040127 * A040129 A040130 A040131

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

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 11 12:38 EDT 2021. Contains 342886 sequences. (Running on oeis4.)