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A146460
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 5, 25, 87, 503, 2831, 25037, 243793, 3762955, 62868913, 1572482009, 42577954723, 1734990453303
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