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A147224
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11011-01110 pattern in any orientation.
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0
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1, 1, 1, 1, 15, 5, 62, 17, 602, 89, 29524, 5783, 1544922, 270221, 203301503, 19830584, 60493044496, 4522566093, 26251057879932, 1590451774176, 23899128298949817, 1088025398592657
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