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A234657
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Number of (n+1)X(7+1) 0..5 arrays with every 2X2 subblock having its diagonal sum differing from its antidiagonal sum by 4 (constant stress 1X1 tilings)
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0
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1434624, 2414992, 4196144, 8731840, 18735792, 46510768, 118121744, 335161744, 966751344, 3047922832, 9726377744, 33467842000, 116063388912
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