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Search: id:A089456
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| A089456 |
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Number of n-celled polyominoes with exactly 4 holes. |
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+0
5
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| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 179, 2509, 25609, 214932, 1578984, 10536260, 65411645, 383981499, 2156114468
(list; graph; listen)
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OFFSET
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1,17
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LINKS
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Tomas Oliveira e Silva, Animal enumerations on the {4,4} Euclidean tiling
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CROSSREFS
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Cf. A001419, A057418, A089454, A089455, A089457, A089458.
Sequence in context: A000839 A001596 A159326 this_sequence A108552 A060593 A130775
Adjacent sequences: A089453 A089454 A089455 this_sequence A089457 A089458 A089459
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KEYWORD
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hard,nonn
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AUTHOR
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Joseph Myers (jsm(AT)polyomino.org.uk), Nov 04 2003
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