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A146743
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1110-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 13, 29, 57, 123, 437, 1523, 7643, 32273, 153925, 786845, 5340469, 36899655, 318800081, 2591600741, 26626203639, 272703572385
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