A106962 - OEIS

A106962

Primes of the form x^2+xy+20y^2, with x and y nonnegative.

83, 179, 223, 397, 479, 541, 563, 677, 727, 757, 811, 863, 907, 941, 967, 1103, 1277, 1289, 1433, 1489, 1523, 1553, 1867, 1889, 1993, 1997, 2011, 2039, 2311, 2341, 2383, 2459, 2551, 2579, 2633, 2647, 2917, 2999, 3271, 3373, 3469, 3739, 3797

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

OFFSET

1,1

COMMENTS

Discriminant=-79.

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, 20, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A084866 A142332 A111078 * A137364 A182479 A106094

Adjacent sequences: A106959 A106960 A106961 * A106963 A106964 A106965

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved