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A006732 Series for first parallel moment of square lattice.
(Formerly M1837)
1
0, 2, 8, 22, 52, 112, 228, 442, 832, 1516, 2720, 4754, 8264, 14000, 23824, 39318, 66052, 106282, 177884, 277936, 469384, 703924, 1225052, 1718226, 3203156, 3974696, 8551248, 8307370, 23950704, 13195606, 72779892, -1798186, 246605280, -165440790, 935635244, -1166043794, 3896720688, -6470965954, 17297466660, -33101156302, 79718300900, -163586078926 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

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..158 (from link below)

J. W. Essam, A. J. Guttmann and K. De'Bell, On two-dimensional directed percolation, J. Phys. A 21 (1988), 3815-3832.

I. Jensen, More terms

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.

CROSSREFS

Sequence in context: A094533 A006696 A094939 * A005803 A145654 A221880

Adjacent sequences:  A006729 A006730 A006731 * A006733 A006734 A006735

KEYWORD

sign

AUTHOR

N. J. A. Sloane, Simon Plouffe

STATUS

approved

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Last modified November 14 07:13 EST 2019. Contains 329111 sequences. (Running on oeis4.)