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A123064
Numbers represented by the quadratic form 2 x^2 + xy + 4 y^2.
7
0, 2, 4, 5, 7, 8, 10, 14, 16, 18, 19, 20, 25, 28, 32, 35, 36, 38, 40, 41, 45, 49, 50, 56, 59, 62, 63, 64, 70, 71, 72, 76, 80, 82, 90, 94, 95, 97, 98, 100, 101, 103, 107, 109, 112, 113, 118, 124, 125, 126, 128, 133, 134, 140, 142, 144, 152, 155, 157, 160, 162, 163, 164, 171, 175
OFFSET
1,2
REFERENCES
J. H. Conway, The Sensual (Quadratic) Form, M.A.A., 1997, p. 82.
LINKS
N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)
PROG
(Magma) L:=LatticeWithGram(2, [4, 1, 1, 8] ); T<q> := ThetaSeries(L, 500); T;
CROSSREFS
Primes: A106872.
Sequence in context: A231979 A072013 A326669 * A108513 A029749 A018519
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 27 2006
STATUS
approved