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Search: id:A131488
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| A131488 |
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a(n) is the number of polyhexes with n edges. |
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+0
1
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| 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 2, 0, 0, 1, 1, 5, 0, 1, 3, 6, 12, 3, 4, 14, 26, 39, 10
(list; graph; listen)
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OFFSET
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1,16
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COMMENT
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An n-celled polyhex with perimeter p has (6n+p)/2 edges. The maximum number of edges in an n-celled polyhex is 5n+1.
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LINKS
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Isoperimetrical Polyhexes at Poly Pages
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CROSSREFS
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Cf. A000228: Number of hexagonal polyominoes (or planar polyhexes) with n cells. A057779: Hexagonal polyominoes (or polyhexes, A000228) with perimeter 2n. A038142: Number of planar cata-polyhexes with n cells.
Sequence in context: A025881 A039804 A035671 this_sequence A130731 A025875 A026840
Adjacent sequences: A131485 A131486 A131487 this_sequence A131489 A131490 A131491
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KEYWORD
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hard,more,nonn
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AUTHOR
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Tanya Khovanova (tanyakh(AT)yahoo.com), Jul 28 2007
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