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A147150
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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 5, 15, 33, 101, 729, 5159, 33035, 302287, 3979621, 62594669, 1090041091, 25034274381, 742760513733, 26752494041629
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