0,5
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 120.
Adjacent sequences: A022067 A022068 A022069 this_sequence A022071 A022072 A022073
Sequence in context: A006274 A060767 A023928 this_sequence A123301 A037933 A098765
nonn
N. J. A. Sloane (njas(AT)research.att.com).
Search completed in 0.002 seconds