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 A038892 Primes p such that 19 is not a square mod p. 3
 2, 7, 11, 13, 23, 29, 37, 41, 43, 47, 53, 83, 89, 97, 109, 113, 131, 139, 163, 173, 181, 191, 193, 199, 239, 241, 251, 257, 263, 269, 271, 281, 283, 293, 311, 317, 337, 347, 359, 367, 373, 401, 409, 419, 421, 433 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Also, only entries p=1 (mod 4) of the sequence are not squares mod 19 (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[120], JacobiSymbol[19, #] == -1 &] (* Vincenzo Librandi, Sep 08 2012 *) CROSSREFS Cf. A297176 Sequence in context: A027697 A235475 A146315 * A019346 A045369 A157975 Adjacent sequences:  A038889 A038890 A038891 * A038893 A038894 A038895 KEYWORD nonn AUTHOR EXTENSIONS Offset changed from 0 to 1 by Vincenzo Librandi, Sep 08 2012 STATUS approved

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Last modified August 13 06:22 EDT 2020. Contains 336442 sequences. (Running on oeis4.)