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A068471
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Number of n X n binary matrices with each 1 having at most 2 adjacent 1's.
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0
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2, 16, 378, 30824, 8402216, 7664347268, 23371379782671, 238225926162821893, 8118262028301675826132, 924887563235974860108746534, 352261845112790535941917078458268
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