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A147004
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-11111-00100 pattern in any orientation.
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0
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1, 1, 1, 1, 5, 1, 13, 5, 80, 15, 1622, 239, 39282, 4131, 1538621, 99155, 127226887, 5960881, 16725872953, 549694386, 3916428224133
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