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A147411
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1001-1001-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 5, 13, 27, 43, 73, 179, 423, 1083, 3071, 10101, 37829, 144853, 562367, 2218397, 9164725, 42914033, 209532563
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