0,5
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120.
Sequence in context: A093257 A069255 A065869 this_sequence A033378 A105326 A129546
Adjacent sequences: A022079 A022080 A022081 this_sequence A022083 A022084 A022085
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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