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A147000
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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 00100-00100-11111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 2, 1, 3, 1, 5, 1, 11, 3, 31, 8, 90, 23, 344, 61, 1429, 183, 6788, 609, 37364, 3021, 252513
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