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A207141
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Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having nonzero determinant and commuting with every horizontal or vertical neighbor
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0
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50, 48, 157, 190, 622, 754, 2482, 3010, 9922, 12034, 39682, 48130, 158722, 192514, 634882, 770050, 2539522, 3080194, 10158082, 12320770, 40632322, 49283074, 162529282, 197132290
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