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A146704
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-1111-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 3, 19, 43, 75, 183, 643, 2215, 9883, 45633, 225733, 1239851, 7715029, 52987121, 415234347, 3530586371, 34390495263
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