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A106971 Primes of the form 5x^2+4xy+5y^2, with x and y nonnegative. 2

%I #17 Aug 05 2014 14:16:29

%S 5,89,101,173,461,593,773,1013,1049,1193,1277,1301,1601,1697,1889,

%T 1973,2309,2393,2441,2621,2729,2957,3617,3701,3797,3881,4157,4289,

%U 4409,4457,4721,4793,4973,5081,5333,5381,5897,6053,6221,6317,6473

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

%C Discriminant=-84.

%H Vincenzo Librandi and Ray Chandler, <a href="/A106971/b106971.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, 4, 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 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)