A038879 10 is a square mod p.

2, 3, 5, 13, 31, 37, 41, 43, 53, 67, 71, 79, 83, 89, 107, 151, 157, 163, 173, 191, 197, 199, 227, 239, 241, 271, 277, 281, 283, 293, 307, 311, 317, 347, 359, 373, 397, 401, 409, 431, 439, 443, 449, 467, 479, 521

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

Comments

2 and 5 together with primes congruent to +/- {1, 3, 9, 13} mod 40. - Eric M. Schmidt, Jan 25 2014

Links

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

Programs

Mathematica

Select[Prime[Range[100]], JacobiSymbol[10, #] != -1 &] (* Vincenzo Librandi, Sep 07 2012 *)