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A007200 Number of self-avoiding walks on hexagonal lattice, with additional constraints.
(Formerly M4838)
+0
2
12, 48, 180, 792, 3444, 15000, 64932, 280200, 1204572, 5159448, 22043292, 93952428, 399711348 (list; graph; listen)
OFFSET

2,1

COMMENT

The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice.

REFERENCES

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

S. Redner, Distribution functions in the interior of polymer chains, J. Phys. A 13 (1980), 3525-3541.

LINKS

G. Nebe and N. J. A. Sloane, Home page for hexagonal (or triangular) lattice A2

CROSSREFS

Cf. A007201.

Sequence in context: A059162 A117027 A161171 this_sequence A061148 A052601 A003498

Adjacent sequences: A007197 A007198 A007199 this_sequence A007201 A007202 A007203

KEYWORD

nonn,walk

AUTHOR

Simon Plouffe (simon.plouffe(AT)gmail.com)

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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