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A096445
Number of reduced primitive positive definite binary quadratic forms of determinant n^2.
2
1, 1, 2, 2, 2, 4, 4
OFFSET
1,3
COMMENTS
Equivalently, of discriminant -4n^2.
LINKS
J. H. Conway and N. J. A. Sloane, Sphere Packings, Lattices and Groups, Springer-Verlag, 3rd edition, 1999, see Table 15.1.
CROSSREFS
Equals A096446(n^2). Cf. A006374.
Sequence in context: A228660 A228796 A155837 * A125915 A071472 A367120
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Aug 11 2004
STATUS
approved