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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106912 Primes of the form 2x^2-xy+7y^2, with x and y nonnegative. 0
2, 7, 13, 73, 83, 127, 167, 173, 197, 233, 263, 283, 337, 347, 373, 503, 547, 557, 563, 607, 677, 733, 743, 787, 853, 887, 937, 953, 1033, 1163, 1187, 1297, 1327, 1427, 1487, 1553, 1583, 1597, 1723, 1777, 1847, 1913, 1933, 1987, 1993, 1997, 2053 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-55. See A106856 for more information.

MATHEMATICA

QuadPrimes[2, -1, 7, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A127487 A180003 A072060 * A099629 A092836 A102152

Adjacent sequences:  A106909 A106910 A106911 * A106913 A106914 A106915

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 17 03:45 EST 2012. Contains 205978 sequences.