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A147057
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-1101-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 3, 15, 43, 67, 135, 405, 1643, 5861, 31427, 120095, 674029, 3441725, 24151139, 153308175, 1325530085
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