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A146806
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-1100-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 13, 47, 229, 1275, 4761, 35421, 393783, 4470765, 65085801, 1244085727
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