A106931 - OEIS

A106931

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

5, 13, 29, 53, 61, 149, 157, 173, 181, 229, 269, 277, 293, 317, 389, 397, 421, 461, 541, 557, 613, 653, 661, 709, 733, 773, 821, 829, 853, 877, 941, 997, 1013, 1061, 1093, 1109, 1117, 1213, 1229, 1301, 1373, 1429, 1549, 1597, 1621, 1637, 1693

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

OFFSET

1,1

COMMENTS

Discriminant=-64.

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

CROSSREFS

Sequence in context: A194700 A220500 A130230 * A078370 A308464 A247903

Adjacent sequences: A106928 A106929 A106930 * A106932 A106933 A106934

KEYWORD

nonn,easy

AUTHOR

T. D. Noe, May 09 2005

STATUS

approved