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A365652
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Number of free n-polyominoids, allowing corner-connections only.
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5
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OFFSET
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1,2
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COMMENTS
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Two squares are allowed to meet in an edge, but the structure must be connected through pure corner-connections (where the two squares meet in a single point) only. There are 3 such cases of size 3; see the linked illustration.
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LINKS
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CROSSREFS
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Cf. A075679 (polyominoids, edge-connections only), A365650 (corner- and edge-connections), A365653 (fixed).
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KEYWORD
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nonn,hard,more
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AUTHOR
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STATUS
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approved
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