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A210987
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Number of fixed polyominoes with 2n-1 cells.
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2
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1, 6, 63, 760, 9910, 135268, 1903890, 27394666, 400795844, 5940738676, 88983512783, 1344372335524, 20457802016011, 313224032098244, 4820975409710116, 74541651404935148, 1157186142148293638, 18027932215016128134
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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Eric Weisstein's World of Mathematics, Polyomino
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FORMULA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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