A005138 Number of n-dimensional determinant 2 lattices. (Formerly M0262)

0, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 4, 6, 7, 11, 14, 24, 30

Offset

0,8

References

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 400.

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=0..18.

Crossrefs

Sequence in context: A029025 A035396 A326077 * A357413 A318296 A035679

Adjacent sequences: A005135 A005136 A005137 * A005139 A005140 A005141

Keyword

nonn

Author

N. J. A. Sloane

Status

approved