0,5
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120.
G. Nebe and N. J. A. Sloane, Home page for this lattice
Sequence in context: A104786 A104787 A023922 this_sequence A156462 A040488 A040489
Adjacent sequences: A022061 A022062 A022063 this_sequence A022065 A022066 A022067
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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