
REFERENCES

M. E. Fisher and M. F. Sykes, Excludedvolume problem and the Ising model of ferromagnetism, Phys. Rev. 114 (1959), 4558.
B. J. Hiley and M. F. Sykes, Probability of initial ring closure in the restricted randomwalk model of a macromolecule, J. Chem. Phys., 34 (1961), 15311537.
B. D. Hughes, Random Walks and Random Environments, Oxford 1995, vol. 1, p. 462.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
M. F. Sykes et al., The number of selfavoiding walks on a lattice, J. Phys. A 5 (1972), 661666.
