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A139834 Primes of the form 6x^2+6xy+11y^2. 1
11, 23, 47, 83, 131, 191, 239, 251, 263, 311, 347, 359, 419, 443, 467, 479, 491, 503, 587, 647, 719, 947, 1031, 1103, 1151, 1163, 1187, 1223, 1259, 1451, 1487, 1499, 1559, 1583, 1607, 1619, 1787, 1811, 1847, 1871, 1907, 2039, 2063, 2087, 2099 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-228. 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 {11, 23, 35, 47, 83, 119, 131, 191, 215} (mod 228).

MATHEMATICA

QuadPrimes2[6, -6, 11, 10000] (* see A106856 *)

PROG

(MAGMA) [ p: p in PrimesUpTo(3000) | p mod 228 in {11, 23, 35, 47, 83, 119, 131, 191, 215}]; // Vincenzo Librandi, Jul 29 2012

CROSSREFS

Sequence in context: A309851 A145994 A217047 * A100558 A126199 A096342

Adjacent sequences:  A139831 A139832 A139833 * A139835 A139836 A139837

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 02 2008

STATUS

approved

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Last modified May 24 23:45 EDT 2020. Contains 334581 sequences. (Running on oeis4.)