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A006462
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Percolation series for directed square lattice.
(Formerly M0186)
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1
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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; internal format)
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OFFSET
| 0,4
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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).
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CROSSREFS
| Cf. A006461.
Sequence in context: A074823 A159916 A159286 * A008281 A094671 A202015
Adjacent sequences: A006459 A006460 A006461 * A006463 A006464 A006465
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KEYWORD
| sign
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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