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A146665
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-0001 pattern in any orientation.
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0
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1, 1, 1, 1, 5, 25, 67, 401, 2363, 17629, 144263, 1829205, 25576287, 554261927, 12075864101
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