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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A106980 Primes of the form 2x^2+xy+11y^2, with x and y nonnegative. 0
2, 11, 47, 89, 113, 251, 293, 311, 443, 599, 653, 659, 677, 809, 911, 1013, 1091, 1163, 1181, 1187, 1361, 1409, 1607, 1871, 1877, 2243, 2351, 2357, 2477, 2549, 2579, 2711, 2741, 2969, 3089, 3221, 3251, 3323, 3461, 3581, 3671, 4013, 4019 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-87. See A106856 for more information.

MATHEMATICA

QuadPrimes[2, 1, 11, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A042927 A140305 A142346 * A089682 A198693 A178710

Adjacent sequences:  A106977 A106978 A106979 * A106981 A106982 A106983

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 13 10:20 EST 2012. Contains 205451 sequences.