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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A139962 Primes of the form 23x^2+22xy+23y^2. 1
23, 71, 167, 311, 431, 479, 503, 719, 743, 839, 887, 911, 983, 1031, 1151, 1319, 1367, 1439, 1559, 1847, 2063, 2111, 2207, 2351, 2543, 2591, 2663, 2879, 2927, 2999, 3023, 3167, 3191, 3359, 3407, 3767, 4007, 4391, 4583, 4703, 4799, 4919 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-1632. See A139827 for more information.

FORMULA

The primes are congruent to {23, 71, 95, 143, 167, 215, 311, 335} (mod 408).

MATHEMATICA

Union[QuadPrimes[23, 22, 23, 10000], QuadPrimes[23, -22, 23, 10000]] (* see A106856 *)

CROSSREFS

Sequence in context: A183012 A154619 A142405 * A139878 A035072 A201716

Adjacent sequences:  A139959 A139960 A139961 * A139963 A139964 A139965

KEYWORD

nonn,easy

AUTHOR

T. D. Noe (noe(AT)sspectra.com), May 02 2008

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

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

Last modified February 14 22:37 EST 2012. Contains 205679 sequences.