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A197160
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Number of fixed poly-[3^4.6]-tiles (holes allowed) with n cells.
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1
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6, 15, 44, 141, 480, 1703, 6216, 23136, 87334, 333309, 1283706, 4982458, 19466130, 76479612, 301923554
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refs;
listen;
history;
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internal format)
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OFFSET
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1,1
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REFERENCES
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Branko Grünbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 2.7, 6.2 and 9.4.
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LINKS
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CROSSREFS
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KEYWORD
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hard,nonn
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AUTHOR
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STATUS
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approved
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