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A106860 Primes of the form 2x^2-xy+2y^2, with x and y nonnegative. 1
2, 3, 17, 47, 53, 113, 167, 197, 227, 233, 263, 317, 383, 443, 557, 563, 587, 593, 677, 683, 773, 827, 863, 887, 947, 977, 1013, 1097, 1103, 1163, 1187, 1193, 1217, 1367, 1373, 1433, 1583, 1607, 1613, 1667, 1697, 1733, 1823, 1847, 1907, 1973, 2063 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Discriminant=-15. See A106856 for more information.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

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

CROSSREFS

Sequence in context: A067976 A154316 A051084 * A042699 A078983 A235617

Adjacent sequences:  A106857 A106858 A106859 * A106861 A106862 A106863

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved

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Last modified April 23 13:39 EDT 2014. Contains 240928 sequences.