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Numbers represented by quadratic form with Gram matrix [ 4, 1; 1, 6 ], divided by 2.
5

%I #13 Jul 09 2014 16:48:42

%S 0,2,3,4,6,8,9,12,13,16,18,24,26,27,29,31,32,36,39,41,46,47,48,50,52,

%T 54,58,62,64,69,71,72,73,75,78,81,82,87,92,93,94,96,98,100,104,108,

%U 116,117,118,123,124,127,128,131,138,139,141,142,144,146,147,150,151,156

%N Numbers represented by quadratic form with Gram matrix [ 4, 1; 1, 6 ], divided by 2.

%C Nonnegative integers of the form 2x^2 + x*y + 3y^2, a positive definite quadratic form of discriminant -23. - _N. J. A. Sloane_, Jul 09 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)

%Y For primes see A106867. Cf. A028958, A033217.

%K nonn,easy

%O 1,2

%A _N. J. A. Sloane_.

%E Corrected and extended by Larry Reeves (larryr(AT)acm.org), Mar 29 2000