0,7
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 234.
Cf. A031137.
Sequence in context: A060711 A128472 A093404 * A050456 A107930 A033400
Adjacent sequences: A031133 A031134 A031135 * A031137 A031138 A031139
nonn,fini,full
N. J. A. Sloane (njas(AT)research.att.com).