A005134 - OEIS

A005134

Number of n-dimensional unimodular lattice (or quadratic forms).
(Formerly M0219)

1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 4, 5, 8, 9, 13, 16, 28, 40, 68, 117, 297, 665

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,9

REFERENCES

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 49.

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

LINKS

CROSSREFS

KEYWORD

nonn,nice,hard

AUTHOR

STATUS

approved