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A197466
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Number of one-sided poly-[4.8^2]-tiles (holes allowed) with n cells (division into triangles is significant).
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2
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1, 2, 3, 8, 14, 36, 80, 206, 494, 1259, 3144, 8085, 20676, 53635, 139144, 363630, 952148, 2504626, 6603367, 17463287
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OFFSET
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1,2
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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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