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A067968
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Number of binary arrangements on n X n array without adjacent three 1's.
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3
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2, 11, 163, 6547, 720417, 216173426, 177509416175, 398239490006383, 2441922679051541299, 40923800121824894177005, 1874434223405139511637099884, 234647514833189124245764389957097
(list; graph; refs; listen; history; internal format)
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