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Numbers represented by quadratic form with Gram matrix [ 3, 1; 1, 5 ].
3

%I #8 Jul 12 2014 14:55:26

%S 0,3,5,6,10,12,13,19,20,21,24,26,27,35,38,40,42,45,48,52,54,59,61,69,

%T 70,75,76,80,83,84,90,91,96,101,104,108,115,117,118,122,125,131,133,

%U 138,139,140,147,150,152,157,160,166,168,171,173,180,181,182,189,192

%N Numbers represented by quadratic form with Gram matrix [ 3, 1; 1, 5 ].

%C Nonnegative integers of the form 3*x^2 + 2*x*y + 5*y^2, discriminant -56. - _Ray Chandler_, Jul 12 2014

%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)

%F a(x_i, x_j) = 3*x_i^2 + 2*x_i*x_j + 5*x_j^2, for all x_i >= 0, x_j any integer.

%K nonn

%O 1,2

%A _N. J. A. Sloane_.

%E More terms from Larry Reeves (larryr(AT)acm.org), Mar 28 2000