A106971 - OEIS

A106971

Primes of the form 5x^2+4xy+5y^2, with x and y nonnegative.

5, 89, 101, 173, 461, 593, 773, 1013, 1049, 1193, 1277, 1301, 1601, 1697, 1889, 1973, 2309, 2393, 2441, 2621, 2729, 2957, 3617, 3701, 3797, 3881, 4157, 4289, 4409, 4457, 4721, 4793, 4973, 5081, 5333, 5381, 5897, 6053, 6221, 6317, 6473

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

OFFSET

1,1

COMMENTS

Discriminant=-84.

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[5, 4, 5, 10000] (* see A106856 *)

CROSSREFS

Sequence in context: A184239 A054954 A266064 * A136618 A138700 A139937

Adjacent sequences: A106968 A106969 A106970 * A106972 A106973 A106974

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved