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A139510 Primes of the form x^2 + 30x*y + y^2 for x and y nonnegative. 1

%I #4 Jun 19 2014 15:31:08

%S 137,193,401,617,641,953,1009,1129,1289,1297,1801,1913,2129,2137,2377,

%T 2473,2657,2713,2801,3049,3257,3313,3329,3593,3889,4001,4057,4153,

%U 4201,4337,4649,4657,4729,4817,4937,4993,5009,5153,5209,5441,5657,5849,5881

%N Primes of the form x^2 + 30x*y + y^2 for x and y nonnegative.

%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 a = {}; w = 30; k = 1; Do[Do[If[PrimeQ[n^2 + w*n*m + k*m^2], AppendTo[a, n^2 + w*n*m + k*m^2]], {n, m, 400}], {m, 1, 400}]; Union[a] (*Artur Jasinski*)

%Y Cf. A139489, A007645, A068228, A007519, A033212, A033212, A107152, A107008, A033215, A107145, A139490, A139491.

%K nonn

%O 1,1

%A _Artur Jasinski_, Apr 24 2008

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Last modified July 14 05:06 EDT 2024. Contains 374291 sequences. (Running on oeis4.)