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A210997
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Number of free polyominoes with 2n-1 cells.
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4
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1, 2, 12, 108, 1285, 17073, 238591, 3426576, 50107909, 742624232, 11123060678, 168047007728, 2557227044764, 39153010938487, 602621953061978, 9317706529987950, 144648268175306702, 2253491528465905342, 35218318816847951974
(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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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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