A038888 Primes p such that 15 is not a square mod p.

13, 19, 23, 29, 31, 37, 41, 47, 73, 79, 83, 89, 97, 101, 107, 139, 149, 151, 157, 167, 193, 199, 211, 227, 263, 269, 271, 277, 281, 313, 331, 337, 347, 373, 379, 383, 389, 397, 401, 433, 439, 443, 449, 457, 461

Offset

1,1

Comments

Subset of A040136.

Also primes p such that p divides 5^(p-1)/2 + 3^(p-1)/2. - Cino Hilliard, Sep 06 2004

Links

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

Mathematica

Select[Prime@Range[120], JacobiSymbol[15, #] == -1 &] (* Vincenzo Librandi, Sep 08 2012 *)

Crossrefs

Sequence in context: A071621 A240565 A160951 * A191020 A180545 A113017

Adjacent sequences: A038885 A038886 A038887 * A038889 A038890 A038891

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved