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A139828 Primes of the form 6x^2+6xy+7y^2. 1
7, 19, 43, 79, 127, 139, 151, 211, 271, 283, 307, 439, 523, 547, 571, 607, 739, 787, 811, 919, 967, 1051, 1063, 1231, 1327, 1399, 1447, 1459, 1471, 1531, 1579, 1627, 1663, 1723, 1759, 1867, 1987, 1999, 2131, 2239, 2251, 2287, 2371, 2383, 2503 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-132. See A139827 for more information.

LINKS

Vincenzo Librandi and Ray Chandler, Table of n, a(n) for n = 1..10000 [First 1000 terms from Vincenzo Librandi]

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

FORMULA

The primes are congruent to {7, 19, 43, 79, 127} (mod 132).

MATHEMATICA

QuadPrimes2[6, -6, 7, 10000] (* see A106856 *)

PROG

(MAGMA) [ p: p in PrimesUpTo(3000) | p mod 132 in {7, 19, 43, 79, 127}]; // Vincenzo Librandi, Jul 29 2012

CROSSREFS

Sequence in context: A259486 A298034 A054691 * A247905 A048488 A155303

Adjacent sequences:  A139825 A139826 A139827 * A139829 A139830 A139831

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 02 2008

EXTENSIONS

Corrected and extended b-file - Ray Chandler, Jul 29 2014

STATUS

approved

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Last modified March 20 13:18 EDT 2019. Contains 321345 sequences. (Running on oeis4.)