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A130623
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Number of polyhexes with perimeter at most 2n.
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0
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0, 0, 1, 1, 2, 3, 6, 8, 20, 34, 84, 182
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OFFSET
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1,5
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COMMENTS
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The perimeter of a polyhex is always even.
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LINKS
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CROSSREFS
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Cf. A038142 (planar cata-polyhexes with n cells).
Cf. A057779 (hexagonal polyominoes with perimeter 2n).
Cf. A131467 (planar polyhexes with at most n cells).
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KEYWORD
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hard,more,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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