%I #13 Jul 29 2015 11:44:37
%S 1,0,2,0,5,0,14,-4,42,-20,126,-100,400,-376,1248,-1556,4231,-5588,
%T 13880,-21912,48985,-76404,165712,-295660,602237,-1017452,2072268,
%U -3935956,7665833,-13411588,26634782,-52362292,99567378,-176237580,348090340,-699582108
%N Bond percolation coefficients S_0 for square lattice.
%H J. W. Essam et al., <a href="http://dx.doi.org/10.1103/PhysRevB.33.1982">Analysis of extended series for bond percolation on the directed square lattice</a>, Phys. Rev. B 33 (1986), 1982-1986.
%Y Cf. A006727, A006728, A006729, A006730.
%K sign
%O 0,3
%A _N. J. A. Sloane_, Jul 27 2015