0,4

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 113, 116.

Table of n, a(n) for n=0..51.

Index entries for sequences related to b.c.c. lattice

Index entries for sequences related to f.c.c. lattice

Sequence in context: A176823 A316199 A300905 * A107779 A018874 A163900

Adjacent sequences: A008661 A008662 A008663 * A008665 A008666 A008667

nonn,easy

N. J. A. Sloane.

approved