0,1

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

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

M. F. Sykes and M. E. Fisher, Antiferromagnetic susceptibility of the plane square and honeycomb Ising lattices, Physica, 28 (1962), 919-938.

Sequence in context: A103129 A009340 A053593 this_sequence A134046 A081687 A082811

Adjacent sequences: A002904 A002905 A002906 this_sequence A002908 A002909 A002910

nonn

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