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A147453
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation.
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0
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1, 1, 1, 1, 3, 1, 15, 9, 105, 33, 2514, 927, 80722, 22331, 4773446, 785549, 420563686, 56689127, 72421134415, 8452376637, 24510814953678, 2212845668155
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