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A139838 Primes of the form 8x^2+8xy+13y^2. 1
13, 29, 61, 101, 109, 149, 173, 197, 277, 293, 349, 373, 461, 541, 557, 613, 677, 701, 733, 821, 853, 877, 941, 997, 1069, 1117, 1229, 1381, 1429, 1493, 1597, 1613, 1669, 1693, 1733, 1789, 1861, 1877, 1933, 1949, 1997, 2053, 2141, 2213, 2221, 2309 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-352. 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 {13, 21, 29, 61, 85} (mod 88).

MATHEMATICA

QuadPrimes2[8, -8, 13, 10000] (* see A106856 *)

PROG

(MAGMA) [ p: p in PrimesUpTo(3000) | p mod 88 in {13, 21, 29, 61, 85}]; // Vincenzo Librandi, Jul 29 2012

CROSSREFS

Sequence in context: A146743 A065546 A075636 * A217197 A141196 A269785

Adjacent sequences:  A139835 A139836 A139837 * A139839 A139840 A139841

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 02 2008

STATUS

approved

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Last modified January 29 16:58 EST 2020. Contains 331347 sequences. (Running on oeis4.)