login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106876 Primes of the form 3x^2-2xy+3y^2, with x and y nonnegative. 2
3, 11, 43, 67, 83, 131, 139, 179, 227, 283, 307, 331, 379, 443, 467, 491, 523, 547, 563, 643, 683, 691, 739, 787, 811, 827, 859, 971, 1019, 1091, 1123, 1163, 1187, 1291, 1307, 1427, 1451, 1523, 1531, 1571, 1619, 1667, 1699, 1723, 1787, 1811 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-32.

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

QuadPrimes2[3, -2, 3, 10000] (* see A106856 *)

CROSSREFS

Cf. A243177, A007520.

Sequence in context: A118166 A277888 A249568 * A034477 A140803 A246758

Adjacent sequences:  A106873 A106874 A106875 * A106877 A106878 A106879

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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 4 21:32 EDT 2021. Contains 346455 sequences. (Running on oeis4.)