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A238250
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Number of (n+1)X(3+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise
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1
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121, 804, 6828, 43456, 284992, 1473792, 7616082, 32986844, 142361644, 537301496, 2020791427, 6843417893, 23099713493, 71683038307, 221767602558, 640525984280, 1844757869502, 5018918602972, 13619020527533, 35234899933725
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