0,3

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 174.

Sequence in context: A034279 A031674 A031584 this_sequence A116195 A051259 A093225

Adjacent sequences: A023937 A023938 A023939 this_sequence A023941 A023942 A023943

nonn

N. J. A. Sloane (njas(AT)research.att.com).