A106928 - OEIS

A106928

Primes of the form 2x^2-xy+8y^2, with x and y nonnegative.

2, 23, 53, 71, 107, 149, 197, 239, 263, 281, 317, 389, 443, 491, 557, 569, 599, 641, 653, 683, 827, 953, 977, 1031, 1061, 1163, 1289, 1439, 1451, 1481, 1499, 1523, 1607, 1619, 1667, 1709, 1787, 1871, 1877, 1901, 2069, 2111, 2129, 2153, 2213

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Discriminant=-63.

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, 8, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A057621 A074809 A084237 * A070934 A296272 A031915

Adjacent sequences: A106925 A106926 A106927 * A106929 A106930 A106931

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved