A038927 - OEIS

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A038927

Primes p such that 47 is a square mod p.

2, 11, 17, 19, 23, 31, 37, 43, 47, 53, 61, 67, 89, 97, 101, 107, 127, 139, 149, 151, 157, 163, 167, 173, 179, 197, 199, 211, 223, 227, 241, 269, 277, 311, 337, 353, 359, 367, 397, 401, 419, 443, 457, 463, 467, 499

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OFFSET

1,1

COMMENTS

Also, only entries p=1 (mod 4) of the sequence are squares mod 47 (from the quadratic reciprocity law). - Lekraj Beedassy, Jul 21 2004

LINKS

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

MATHEMATICA

Select[Prime[Range[100]], ! JacobiSymbol[47, #] == -1 &] (* Vincenzo Librandi, Sep 08 2012 *)

CROSSREFS

Sequence in context: A012253 A103336 A019402 * A105877 A309499 A173638

Adjacent sequences: A038924 A038925 A038926 * A038928 A038929 A038930

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved