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A197158
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Number of fixed poly-[3^3.4^2]-tiles (polyhouses) (holes allowed) with n cells.
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2
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2, 5, 16, 57, 212, 817, 3232, 13018, 53176, 219680, 915928, 3848079, 16271384, 69183099, 295561620
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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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