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A146062
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 2X3 U in any orientation.
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0
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1, 1, 1, 5, 13, 37, 193, 825, 4833, 42541, 409765, 5652913, 85462407, 1745289105, 41548085965, 1274611587285, 46878706682435, 2328792987017875
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