0,2

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

J. W. Essam, Percolation and cluster size, in C. Domb and M. S. Green, Phase Transitions and Critical Phenomena, Ac. Press 1972, Vol. 2; see especially pp. 225-226.

M. F. Sykes and J. W. Essam, Critical percolation probabilities by series methods, Phys. Rev., 133 (1964), A310-A315.

Sequence in context: A123857 A048168 A131649 this_sequence A007096 A036313 A121986

Adjacent sequences: A003196 A003197 A003198 this_sequence A003200 A003201 A003202

nonn

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