0,6
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120.
Sequence in context: A111413 A072838 A023919 this_sequence A010111 A118067 A037217
Adjacent sequences: A008430 A008431 A008432 this_sequence A008434 A008435 A008436
nonn,easy
N. J. A. Sloane (njas(AT)research.att.com).
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