0,2
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p 102 eq 9.
Sequence in context: A029594 A033712 A033730 this_sequence A063944 A086447 A140219
Adjacent sequences: A033751 A033752 A033753 this_sequence A033755 A033756 A033757
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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