0,3
J. H. Conway and N. J. A. Sloane, Sphere Packings, Lattices and Groups, Chap. 6.
Table of n, a(n) for n=0..6.
G. Nebe and N. J. A. Sloane, Home page for this lattice
Sequence in context: A099178 A209711 A228964 * A181073 A023065 A190413
Adjacent sequences: A047625 A047626 A047627 * A047629 A047630 A047631
nonn
N. J. A. Sloane
approved