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A146617
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0110 pattern in any orientation.
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0
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1, 1, 1, 1, 5, 21, 57, 285, 1551, 8309, 69683, 754867, 9884801, 158671845, 3311072917, 81046423259
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