A006727 Bond percolation series for square lattice.

1, 2, 4, 8, 15, 28, 50, 90, 156, 274, 466, 804, 1348, 2300, 3804, 6450, 10547, 17784, 28826, 48464, 77689, 130868, 207308, 350014, 548271, 931584, 1433966, 2469368, 3725257, 6510384, 9590838, 17192714, 24357702, 45428434, 61388268, 119938514, 152169019, 320596894, 366032458, 863591282, 863729021, 2341276788, 1916799026, 6556348906, 3755360368, 18610776960, 6082131438, 53874179752, 1495903344, 164440159702, -48816119038, 507516102724, -288652716240, 1605880660392, -1407950918758

Offset: 0

Author

N. J. A. Sloane, Simon Plouffe

Keywords

• sign
• nice

References

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

Links

• I. Jensen, Table of n, a(n) for n = 0..171 (from link below)
• J. Blease, Series expansions for the directed-bond percolation problem, J. Phys C vol 10 no 7 (1977), 917-924.
• I. G. Enting, A, J. Guttmann and I. Jensen, Low-Temperature Series Expansions for the Spin-1 Ising Model, arXiv:hep-lat/9410005, 1994; J. Phys. A. 27 (1994) 6987-7006.
• J. W. Essam, A. J. Guttmann and K. De'Bell, On two-dimensional directed percolation, J. Phys. A 21 (1988), 3815-3832.
• J. W. Essam et al., Analysis of extended series for bond percolation on the directed square lattice, Phys. Rev. B 33 (1986), 1982-1986.
• I. Jensen, More terms [Archived website]
• Iwan Jensen, Anthony J. Guttmann, Series expansions of the percolation probability for directed square and honeycomb lattices, arXiv:cond-mat/9509121, 1995; J. Phys. A 28 (1995), no. 17, 4813-4833.