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A250692
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Number of (1+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
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4
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104, 543, 2541, 11150, 47002, 193117, 780551, 3122604, 12415380, 49197371, 194657281, 769963978, 3046948238, 12068103705, 47849956731, 189941232872, 754813261576, 3002665654519, 11955693334901, 47642223194886
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