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A067676
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Number of fixed directed convex polyominoes with n cells.
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2
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1, 2, 5, 13, 33, 82, 200, 481, 1144, 2699, 6329, 14775, 34381, 79819, 185001, 428290, 990716, 2290424, 5293153, 12229209, 28249088, 65246630, 150687282, 347993954, 803620981, 1855754764, 4285319033, 9895581541, 22850547145, 52765494456, 121843455307
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OFFSET
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1,2
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LINKS
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CROSSREFS
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KEYWORD
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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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