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: A101375 A074007 A152573 this_sequence A117489 A050510 A055281

Adjacent sequences: A003208 A003209 A003210 this_sequence A003212 A003213 A003214

nonn

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