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A106857 Primes of the form x^2+xy+3y^2, with x and y nonnegative. +0
2
3, 5, 23, 31, 37, 47, 53, 59, 67, 89, 97, 113, 157, 163, 179, 181, 191, 199, 251, 257, 269, 311, 313, 317, 331, 367, 379, 383, 389, 401, 419, 433, 443, 449, 463, 487, 499, 509, 521, 577, 587, 599, 617, 641, 643, 647, 653, 683, 691, 709, 719, 727, 751, 757 (list; graph; listen)
OFFSET

1,1

COMMENT

Discriminant=-11. See A106856 for more information.

MATHEMATICA

QuadPrimes[1, 1, 3, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A137084 A067256 A136891 this_sequence A106307 A106282 A163153

Adjacent sequences: A106854 A106855 A106856 this_sequence A106858 A106859 A106860

KEYWORD

nonn,easy

AUTHOR

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

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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