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A055919
Number of directed site animals on hexagonal net (honeycomb) with n sites.
1
2, 4, 10, 24, 60, 152, 402, 1094, 3012, 8232, 22086
OFFSET
1,1
LINKS
A. J. Guttmann, Indicators of solvability for lattice models, Discrete Math., 217 (2000), 167-189.
A. J. Guttmann and A. R. Conway, Hexagonal lattice directed site animals, Statistical Physics on the Eve of the Twenty-First Century, ed. M. T. Batchelor, World Scientific, 1999.
CROSSREFS
Row sums of A055907.
Sequence in context: A291419 A088354 A329673 * A006575 A307900 A230551
KEYWORD
nonn,more
AUTHOR
Christian G. Bower, Jun 22 2000
EXTENSIONS
Name edited by Andrey Zabolotskiy, Jun 21 2022
STATUS
approved