0,3
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120.
Sequence in context: A050525 A138086 A023933 this_sequence A037939 A040010 A160330
Adjacent sequences: A022072 A022073 A022074 this_sequence A022076 A022077 A022078
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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