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A147339
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-0100-1111-0010-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 11, 15, 183, 305, 1851, 3761, 35145, 75363, 1670651, 4265463, 180681913, 541465905, 30900571055, 107421245147, 8457236647761, 34044967457309, 4310491231691799
(list; graph; refs; listen; history; internal format)
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