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A146824
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 193, 369, 2631, 6147, 72935, 183013, 4104827, 12415887, 1843421399, 7169739931, 1106512780955, 5150025315155, 883358137678737, 4992528269858869
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