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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A139957 Primes of the form 4x^2+4xy+103y^2. 1
103, 127, 151, 223, 271, 463, 631, 727, 919, 967, 1039, 1063, 1087, 1279, 1327, 1447, 1471, 1543, 1759, 1783, 1879, 1951, 2143, 2287, 2311, 2503, 2551, 2671, 2719, 2767, 3079, 3319, 3391, 3511, 3583, 3727, 3823, 3919, 3943, 4231, 4327 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-1632. 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 {55, 103, 127, 151, 223, 247, 271, 319} (mod 408).

MATHEMATICA

QuadPrimes2[4, -4, 103, 10000] (* see A106856 *)

PROG

(MAGMA) [ p: p in PrimesUpTo(5000) | p mod 408 in [55, 103, 127, 151, 223, 247, 271, 319]]; // Vincenzo Librandi, Aug 02 2012

CROSSREFS

Sequence in context: A098049 A055628 A139643 * A077404 A139979 A146357

Adjacent sequences:  A139954 A139955 A139956 * A139958 A139959 A139960

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 May 19 14:36 EDT 2019. Contains 323395 sequences. (Running on oeis4.)