0,9
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120.
Sequence in context: A061040 A159456 A064563 this_sequence A134341 A125841 A154051
Adjacent sequences: A008433 A008434 A008435 this_sequence A008437 A008438 A008439
nonn,easy
N. J. A. Sloane (njas(AT)research.att.com).
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