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A251020
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Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements
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0
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110, 2546, 20608, 119632, 516684, 2160510, 7948184, 29146692, 100696896, 345190686, 1144782282, 3748752570, 12009496342, 37949629638
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