0,1

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 511.

Sequence in context: A027567 A033475 A053060 this_sequence A134164 A098209 A114721

Adjacent sequences: A004031 A004032 A004033 this_sequence A004035 A004036 A004037

nonn

N. J. A. Sloane (njas(AT)research.att.com).