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A151518
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Number of 2-sided strip polyiamonds with n cells.
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0
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1, 1, 1, 2, 3, 5, 8, 15, 25, 46, 80, 145, 256, 466, 833, 1513, 2720, 4925, 8881, 16063, 28996, 52373, 94563, 170620, 307989, 555214, 1001774, 1804594, 3254229, 5858448
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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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