login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106954 Primes of the form 4x^2+2xy+5y^2, with x and y any integer. 2
5, 7, 11, 17, 43, 47, 61, 73, 131, 137, 139, 149, 191, 199, 229, 233, 239, 251, 263, 277, 283, 311, 347, 349, 359, 389, 397, 443, 457, 461, 463, 467, 499, 541, 557, 577, 587, 613, 617, 631, 643, 647, 653, 691, 719, 727, 739, 757, 761, 769, 809, 821, 823 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Discriminant=-76.
Primes p such that the polynomial x^3-2x-2 is irreducible over Zp. The polynomial discriminant is also -76. - T. D. Noe, May 13 2005
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)
MATHEMATICA
Union[QuadPrimes2[4, 2, 5, 10000], QuadPrimes2[4, -2, 5, 10000]] (* see A106856 *)
CROSSREFS
Sequence in context: A023241 A174357 A134572 * A027755 A260828 A280651
KEYWORD
nonn,easy
AUTHOR
T. D. Noe, May 09 2005
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 13 18:16 EDT 2024. Contains 374285 sequences. (Running on oeis4.)