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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106862 Primes of the form x^2+xy+5y^2, with x and y nonnegative. 1
5, 7, 11, 17, 23, 47, 61, 73, 83, 101, 131, 137, 139, 149, 157, 163, 191, 197, 199, 229, 251, 263, 271, 277, 283, 311, 347, 349, 353, 359, 367, 389, 419, 443, 457, 461, 463, 467, 499, 503, 541, 557, 571, 593, 613, 617, 619, 631, 643, 647, 653, 691, 701, 719 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-19. See A106856 for more information.

MATHEMATICA

QuadPrimes[1, 1, 5, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A191080 A067830 A191019 * A027690 A087200 A153118

Adjacent sequences:  A106859 A106860 A106861 * A106863 A106864 A106865

KEYWORD

nonn,easy

AUTHOR

T. D. Noe (noe(AT)sspectra.com), May 09 2005

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 18:33 EST 2012. Contains 205663 sequences.