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A107004 Primes of the form 5x^2-2xy+5y^2, with x and y nonnegative. 1

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

%S 5,53,101,173,269,317,389,653,701,797,821,941,1061,1229,1277,1301,

%T 1493,1613,1709,1733,1949,1997,2069,2141,2333,2357,2381,2477,2549,

%U 2693,2741,2789,2837,2957,3389,3413,3533,3557,3701,3797,3821,4229

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

%C Discriminant=-96.

%H Vincenzo Librandi and Ray Chandler, <a href="/A107004/b107004.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, -2, 5, 10000] (* see A106856 *)

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 09 2005

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Last modified April 25 10:22 EDT 2024. Contains 371967 sequences. (Running on oeis4.)