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A146230
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 3, 13, 33, 61, 183, 597, 2481, 11129, 55369, 260691, 1725489, 11211005, 97261999, 792491905, 8327148961, 84267555083, 1143224998469
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