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A133515
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Number of n X n binary matrices with every 1 vertically or horizontally adjacent to some 0.
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0
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1, 11, 291, 28661, 10982565, 16031828359, 89373230342147, 1904212088591018521, 155026375803222057878889, 48225130114674924906540348115, 57322477811272486520770053115140403
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