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: A024505 A005256 A097979 this_sequence A038620 A039695 A079079

Adjacent sequences: A003201 A003202 A003203 this_sequence A003205 A003206 A003207

nonn

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