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!)
A191080 Primes p that have Kronecker symbol (p|78) = -1. 1
5, 7, 11, 17, 23, 31, 43, 59, 61, 73, 83, 97, 113, 139, 149, 151, 157, 181, 191, 193, 197, 211, 223, 227, 233, 241, 257, 263, 271, 277, 283, 293, 311, 317, 373, 409, 457, 461, 463, 487, 503, 509, 521, 523, 547, 557, 569, 571, 577, 587, 599, 631, 641, 647 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Originally erroneously named "Primes that are not squares mod 78". - M. F. Hasler, Jan 18 2016

LINKS

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

MATHEMATICA

Select[Prime[Range[200]], JacobiSymbol[#, 78]==-1&]

PROG

(MAGMA) [p: p in PrimesUpTo(647) | KroneckerSymbol(p, 78) eq -1]; // Vincenzo Librandi, Sep 11 2012

CROSSREFS

Sequence in context: A166574 A163846 A156104 * A293200 A067830 A191019

Adjacent sequences:  A191077 A191078 A191079 * A191081 A191082 A191083

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 25 2011

EXTENSIONS

Definition corrected, following a suggestion from David Broadhurst, by M. F. Hasler, Jan 18 2016

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 August 4 18:27 EDT 2020. Contains 336202 sequences. (Running on oeis4.)