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A006462 Percolation series for directed square lattice.
(Formerly M0186)
1
1, 0, -1, -2, -2, 0, 2, 4, 3, 0, -1, 6, 28, 72, 139, 242, 407, 722, 1215, 2348, 3753, 7186, 9558, 21800, 16576, 61234, -7978, 226136, -446034, 1118180, -3180033, 6428640, -24607343, 56904504 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

REFERENCES

R. J. Baxter and A. J. Guttmann, Series expansion of the percolation probability for the directed square lattice, J. Phys. A 21 (1988), 3193-3204.

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

LINKS

Table of n, a(n) for n=0..33.

CROSSREFS

Cf. A006461.

Sequence in context: A159916 A159286 A261277 * A278483 A008281 A094671

Adjacent sequences:  A006459 A006460 A006461 * A006463 A006464 A006465

KEYWORD

sign

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 18 04:47 EST 2019. Contains 319269 sequences. (Running on oeis4.)