1,1
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
J. Blease, Series expansions for the directed-bond percolation problem, J. Phys. C 10 (1977), 917-924.
Sequence in context: A140348 A139561 A152169 this_sequence A090401 A113041 A026289
Adjacent sequences: A006807 A006808 A006809 this_sequence A006811 A006812 A006813
nonn
N. J. A. Sloane (njas(AT)research.att.com).
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