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A151517
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Number of 1-sided strip polyiamonds with n cells.
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0
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1, 1, 1, 3, 4, 9, 13, 28, 44, 88, 149, 283, 494, 920, 1633, 3004, 5382, 9814, 17660, 32058, 57809, 104630, 188800, 341027, 615401, 1110062, 2002521, 3608523, 6506635, 11715740
(list;
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listen;
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OFFSET
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1,4
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LINKS
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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