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A197159
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Number of free poly-[3^4.6]-tiles (holes allowed) with n cells.
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13
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1, 3, 8, 25, 80, 291, 1036, 3875, 14561, 55624, 213951, 830712, 3244355, 12747718, 50320659
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listen;
history;
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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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Analogous for other tilings: A000105 (square), A000228 (hexagonal), A000577 (triangular), A197156 (prismatic pentagonal), A197459 (rhombille), A197462 (kisrhombille), A197465 (tetrakis square), A309159 (snub square), A343398 (trihexagonal), A343406 (truncated hexagonal), A343577 (truncated square).
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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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