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A038921

Primes p such that 42 is a square mod p.

2, 3, 7, 11, 13, 17, 19, 29, 41, 47, 53, 61, 79, 89, 107, 127, 139, 149, 151, 157, 167, 179, 181, 193, 197, 229, 257, 283, 307, 311, 317, 337, 347, 349, 353, 383, 389, 397, 443, 457, 463, 479, 487, 491, 503, 521

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OFFSET

1,1

LINKS

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

MATHEMATICA

Select[Prime[Range[100]], ! JacobiSymbol[42, #] == -1 &] (* Vincenzo Librandi, Sep 08 2012 *)

CROSSREFS

Sequence in context: A141657 A265760 A071200 * A129633 A020622 A045320

Adjacent sequences: A038918 A038919 A038920 * A038922 A038923 A038924

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

URL: https://oeis.org/A038921

⇱ A038921 - OEIS