A006835 Percolation series for directed square lattice. (Formerly M2742)

1, 0, -1, -3, -8, -21, -56, -154, -434, -1252, -3675, -10954, -33044, -100676, -309569, -957424, -2987846, -9330274, -29522921, -92459524, -298142956, -922424269, -3098690837, -9042937179, -34187149573, -79544646085

Offset

0,4

References

K. De'Bell and J. W. Essam, Estimates of the site percolation probability exponents for some directed lattices, J. Phys. A 16 (1983), 3145-3147.

Iwan Jensen and Anthony J. Guttmann, Series Expansions of the Percolation Probability for Directed Square and Honeycomb Lattices, J. Phys. A 28 (1995), 4813-4833.

R. N. Onody and U. P. C. Neves, Series Expansion of the Directed Percolation Probability, J. Phys. A 25 (1992), 6609-6615.

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..37 (from link below)

I. Jensen, More terms

Crossrefs

Sequence in context: A243633 A094374 A008909 * A014318 A158495 A349186

Adjacent sequences: A006832 A006833 A006834 * A006836 A006837 A006838

Keyword

sign

Author

N. J. A. Sloane and Simon Plouffe

Status

approved