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A230969
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Number of (n+2)X(n+2) 0..3 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero
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0
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0, 144, 13872, 6170256, 11094079744, 66985909298064, 1388708377137781120, 101290675055736816040000, 25961188014463809661357637024, 23330456050837373777439681163833600
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