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A106871 Primes of the form 2x^2+xy+4y^2, with x and y nonnegative. 2
2, 7, 41, 59, 101, 107, 109, 233, 257, 281, 307, 311, 397, 419, 421, 503, 599, 659, 691, 733, 751, 907, 1051, 1061, 1087, 1103, 1163, 1217, 1249, 1279, 1291, 1307, 1321, 1361, 1373, 1433, 1471, 1489, 1597, 1621, 1693, 1733, 1777, 1787, 1831 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-31.

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[2, 1, 4, 10000] (* see A106856 *)

CROSSREFS

Cf. A123064, A106872.

Sequence in context: A340005 A325061 A215207 * A107376 A220896 A087804

Adjacent sequences:  A106868 A106869 A106870 * A106872 A106873 A106874

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved

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Last modified August 1 03:52 EDT 2021. Contains 346384 sequences. (Running on oeis4.)