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A274504 Primes with Kronecker symbol (p|2*7) != 1. 1
2, 7, 11, 17, 29, 31, 37, 41, 43, 47, 53, 67, 73, 89, 97, 103, 107, 109, 149, 163, 167, 179, 197, 199, 211, 223, 241, 257, 271, 277, 311, 313, 317, 331, 347, 353, 367, 373, 379, 383, 389, 409, 421, 433, 439, 443, 479, 491, 499, 503, 521, 541, 547, 557 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A191017.

Conjecture: primes not congruent to (1, 3, 5, 9, 13, 15, 19, 23, 25, 27, 39, 45) mod 56.

LINKS

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

MATHEMATICA

Select[Prime[Range[200]], ! JacobiSymbol[#, 14] == 1 &]

PROG

(MAGMA) [p: p in PrimesUpTo(619) | not KroneckerSymbol(p, 14) eq 1];

CROSSREFS

Cf. A191017.

Sequence in context: A156828 A019385 A075552 * A124854 A240878 A109953

Adjacent sequences:  A274501 A274502 A274503 * A274505 A274506 A274507

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jun 29 2016

STATUS

approved

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Last modified June 6 15:48 EDT 2020. Contains 334828 sequences. (Running on oeis4.)