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A006377 Determinants of indecomposable indefinite ternary quadratic forms.
(Formerly M4501)
3
8, 28, 32, 56, 64, 68, 72, 92 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 399.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=1..8.

A. Schiemann, Brandt-Intrau tables recomputed

CROSSREFS

Cf. A006377, A071136.

Sequence in context: A201101 A201105 A184614 * A319233 A323198 A121739

Adjacent sequences:  A006374 A006375 A006376 * A006378 A006379 A006380

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified August 20 18:56 EDT 2019. Contains 326154 sequences. (Running on oeis4.)