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A007274
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Expansion for generalized walks on hexagonal lattice.
(Formerly M4222)
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0
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1, 6, 36, 216, 1260, 7206, 40650, 227256, 1262832, 6983730, 38470220, 211220800, 1156490000, 6317095284, 34435495872
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| The hexagonal lattice is the familiar 2-dimensional lattice in which each point has 6 neighbors. This is sometimes called the triangular lattice.
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REFERENCES
| A. J. Guttmann, C. Byrnes and N. E. Frankel, A generalized self-avoiding walk, J. Phys. A 17 (1984), L457-L461.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| G. Nebe and N. J. A. Sloane, Home page for hexagonal (or triangular) lattice A2
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CROSSREFS
| Sequence in context: A036162 A061708 A124535 * A126634 A007275 A206452
Adjacent sequences: A007271 A007272 A007273 * A007275 A007276 A007277
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KEYWORD
| nonn,walk
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AUTHOR
| Simon Plouffe (simon.plouffe(AT)gmail.com)
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