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A106985 Primes of the form 5x^2+3xy+5y^2, with x and y nonnegative. 2

%I #17 Aug 05 2014 14:16:30

%S 5,13,31,59,83,97,271,307,349,353,409,479,593,643,691,733,761,839,941,

%T 983,1151,1217,1259,1307,1567,1601,1721,1861,1867,1879,1931,2113,2243,

%U 2273,2309,2351,2371,2663,2719,2749,2777,2803,2819,2897,2953,2957

%N Primes of the form 5x^2+3xy+5y^2, with x and y nonnegative.

%C Discriminant=-91.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106985/b106985.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]

%H N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references)

%t QuadPrimes2[5, 3, 5, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)