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 A028929 Numbers represented by quadratic form with Gram matrix [ 4, 1; 1, 6 ], divided by 2. 5
 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, 54, 58, 62, 64, 69, 71, 72, 73, 75, 78, 81, 82, 87, 92, 93, 94, 96, 98, 100, 104, 108, 116, 117, 118, 123, 124, 127, 128, 131, 138, 139, 141, 142, 144, 146, 147, 150, 151, 156 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS 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 LINKS N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references) CROSSREFS For primes see A106867. Cf. A028958, A033217. Sequence in context: A010407 A035240 A278580 * A274452 A018731 A232966 Adjacent sequences:  A028926 A028927 A028928 * A028930 A028931 A028932 KEYWORD nonn,easy AUTHOR EXTENSIONS Corrected and extended by Larry Reeves (larryr(AT)acm.org), Mar 29 2000 STATUS approved

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Last modified February 21 11:36 EST 2019. Contains 320372 sequences. (Running on oeis4.)