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A147018
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 01000-11111-00010 pattern in any orientation.
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0
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1, 1, 1, 1, 5, 9, 21, 35, 177, 589, 4235, 15969, 164553, 879607, 12456629, 97189937, 1947709409, 20669429409
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