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A250679
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Number of (3+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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1
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2512, 34630, 388916, 4008211, 38224684, 345255872, 2996016017, 25227877364, 207711004347, 1680947958659, 13425296521939, 106128580452188, 832257246775220, 6485280761219682, 50282187542669984, 388284093532906123
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical recurrence of order 58 (see link above)
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EXAMPLE
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Some solutions for n=2
..2..0..0....0..0..0....3..0..3....1..0..1....1..1..3....1..1..1....1..2..0
..2..0..1....1..1..1....1..2..1....2..1..3....1..1..3....2..0..2....3..0..2
..2..1..2....1..2..0....2..1..3....1..3..1....0..2..2....2..1..3....2..1..3
..2..2..1....0..3..3....3..2..2....1..3..2....1..3..1....2..2..2....1..3..1
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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