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A106863 Primes of the form x^2-xy+5y^2, with x and y nonnegative. +0
2
5, 7, 11, 17, 19, 23, 43, 47, 61, 73, 83, 101, 131, 137, 139, 149, 157, 163, 191, 197, 199, 229, 233, 239, 251, 263, 271, 277, 283, 311, 313, 347, 349, 353, 359, 367, 389, 397, 419, 443, 457, 461, 463, 467, 479, 491, 499, 503, 541, 557, 571, 577, 587, 593 (list; graph; listen)
OFFSET

1,1

COMMENT

Discriminant=-19. See A106856 for more information.

MATHEMATICA

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

CROSSREFS

Sequence in context: A073681 A155772 A020582 this_sequence A110016 A056775 A015917

Adjacent sequences: A106860 A106861 A106862 this_sequence A106864 A106865 A106866

KEYWORD

nonn,easy

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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