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A146476
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1110-0111 pattern in any orientation.
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0
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1, 1, 1, 5, 9, 21, 67, 487, 1541, 16797, 92947, 1357947, 11628507, 269865307, 3412847085, 120253566545
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