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A146411
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-0100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 7, 21, 45, 89, 233, 863, 3251, 15437, 73625, 393971, 2328247, 15894743, 120359659, 1040197243, 9831811849, 105976019467
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