0,5
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120.
Sequence in context: A031697 A098251 A115464 this_sequence A023697 A038468 A131348
Adjacent sequences: A004531 A004532 A004533 this_sequence A004535 A004536 A004537
nonn
njas
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