0,5
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120.
Sequence in context: A093631 A087513 A147667 this_sequence A110823 A058913 A106657
Adjacent sequences: A022081 A022082 A022083 this_sequence A022085 A022086 A022087
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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