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A106873 Primes of the form 2x^2-xy+4y^2, with x and y nonnegative. +0
1
2, 5, 19, 71, 97, 103, 113, 157, 163, 191, 193, 211, 317, 359, 373, 439, 443, 467, 479, 541, 547, 563, 593, 661, 683, 701, 727, 769, 877, 887, 977, 997, 1033, 1039, 1093, 1123, 1151, 1223, 1229, 1289, 1399, 1409, 1423, 1427, 1459, 1601, 1609, 1613 (list; graph; listen)
OFFSET

1,1

COMMENT

Discriminant=-31. See A106856 for more information.

MATHEMATICA

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

CROSSREFS

Sequence in context: A047022 A148436 A148437 this_sequence A014273 A150026 A150027

Adjacent sequences: A106870 A106871 A106872 this_sequence A106874 A106875 A106876

KEYWORD

nonn,easy

AUTHOR

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

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.


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