A106922 - OEIS

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A106922

Primes of the form x^2-xy+15y^2, with x and y nonnegative.

17, 59, 71, 139, 163, 197, 223, 317, 373, 383, 389, 439, 461, 479, 521, 547, 631, 641, 677, 727, 733, 743, 787, 827, 953, 1019, 1063, 1103, 1181, 1201, 1229, 1237, 1327, 1361, 1373, 1511, 1559, 1619, 1657, 1693, 1747, 1787, 1823, 1907, 1913, 1951

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

OFFSET

1,1

COMMENTS

Discriminant=-59.

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[1, -1, 15, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A029914 A058319 A095089 * A110092 A360155 A141896

Adjacent sequences: A106919 A106920 A106921 * A106923 A106924 A106925

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved