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 A028961 Theta series of quadratic form (or lattice) with Gram matrix [ 3, 1; 1, 8 ]. 1
 1, 0, 0, 2, 0, 0, 0, 0, 2, 2, 0, 0, 2, 2, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 2, 0, 2, 0, 2, 2, 0, 0, 0, 2, 0, 0, 2, 0, 2, 0, 0, 0, 0, 0, 2, 4, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 2, 0, 2, 4, 2, 0, 2, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 6, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS The number of integer solutions (x, y) to 3*x^2 + 2*x*y + 8*y^2, discriminant -92. - Ray Chandler, Jul 12 2014 LINKS John Cannon, Table of n, a(n) for n = 0..10000 N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references) CROSSREFS Sequence in context: A073091 A125250 A048113 * A110177 A036273 A342563 Adjacent sequences:  A028958 A028959 A028960 * A028962 A028963 A028964 KEYWORD nonn AUTHOR STATUS approved

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Last modified August 3 12:33 EDT 2021. Contains 346438 sequences. (Running on oeis4.)