0,2
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p 102 eq 9.
Sequence in context: A120456 A115383 A033717 this_sequence A124340 A071165 A137688
Adjacent sequences: A033753 A033754 A033755 this_sequence A033757 A033758 A033759
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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