A005139 Number of n-dimensional determinant 3 lattices. (Formerly M0218)

0, 1, 2, 2, 2, 2, 3, 3, 4, 5, 7, 8, 10, 13, 19, 24, 36, 53

Offset

0,3

References

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 402.

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..17.

Crossrefs

Sequence in context: A249040 A153683 A275882 * A005134 A081651 A269333

Adjacent sequences: A005136 A005137 A005138 * A005140 A005141 A005142

Keyword

nonn

Author

N. J. A. Sloane

Status

approved