0,2
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p 102 eq 9.
Sequence in context: A057607 A139213 A033727 this_sequence A136426 A157491 A094385
Adjacent sequences: A033754 A033755 A033756 this_sequence A033758 A033759 A033760
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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