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

 

Logo

Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106935 Primes of the form 3x^2+2xy+6y^2, with x and y any integer. 1
3, 7, 11, 23, 31, 71, 79, 107, 131, 139, 163, 167, 199, 211, 227, 283, 311, 347, 367, 379, 419, 431, 439, 479, 487, 499, 503, 547, 571, 607, 619, 643, 683, 691, 719, 743, 751, 787, 811, 823, 827, 839, 887, 907, 911, 947, 983, 991, 1031, 1051, 1091, 1151 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-68.

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[3, 2, 6, 10000], QuadPrimes2[3, -2, 6, 10000]] (* see A106856 *)

CROSSREFS

Sequence in context: A095102 A192614 A112715 * A116362 A090918 A139253

Adjacent sequences:  A106932 A106933 A106934 * A106936 A106937 A106938

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 | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified August 29 06:14 EDT 2014. Contains 246187 sequences.