login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A139853 Primes of the form 11x^2+6xy+11y^2. 2
11, 43, 67, 107, 163, 179, 211, 331, 347, 379, 443, 491, 499, 547, 571, 659, 683, 739, 827, 883, 907, 947, 1019, 1051, 1163, 1171, 1187, 1283, 1451, 1499, 1523, 1579, 1619, 1667, 1723, 1747, 1787, 2003, 2011, 2027, 2083, 2179, 2251, 2339, 2347 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-448. 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, 43, 51} (mod 56).

MATHEMATICA

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

PROG

(MAGMA) [ p: p in PrimesUpTo(3000) | p mod 56 in {11, 43, 51}]; // _Vincenzao Librandi_, Jul 29 2012

CROSSREFS

Sequence in context: A226617 A222184 A141195 * A023299 A031904 A305708

Adjacent sequences:  A139850 A139851 A139852 * A139854 A139855 A139856

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 02 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 13 00:25 EST 2019. Contains 329083 sequences. (Running on oeis4.)