1,2

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

M. F. Sykes, D. G. Gaunt, P. D. Roberts and J. A. Wyles, High temperature series for the susceptibility of the Ising model, I. Two dimensional lattices, J. Phys. A 5 (1972) 624-639.

Sequence in context: A167359 A007216 A057378 this_sequence A137279 A167350 A156457

Adjacent sequences: A002976 A002977 A002978 this_sequence A002980 A002981 A002982

nonn,nice

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