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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106900 Primes of the form x^2+xy+12y^2, with x and y nonnegative. 2
83, 191, 197, 269, 439, 487, 523, 619, 823, 907, 947, 977, 1193, 1277, 1319, 1447, 1481, 1499, 1579, 1709, 1741, 1811, 1861, 1867, 2053, 2213, 2221, 2273, 2351, 2447, 2539, 2777, 2789, 2879, 2917, 2939, 2963, 3061, 3089, 3203, 3373, 3449 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-47.

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[1, 1, 12, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A142443 A044415 A044796 * A142621 A142681 A066366

Adjacent sequences:  A106897 A106898 A106899 * A106901 A106902 A106903

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 December 8 01:54 EST 2019. Contains 329850 sequences. (Running on oeis4.)