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A251032
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Number of (n+1)X(3+1) 0..3 arrays with nondecreasing min(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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4050, 45560, 422538, 3396593, 25346175, 179902335, 1238480366, 8354406377, 55641391371, 367591666672, 2416936370291, 15850140474874, 103825482991322, 679947967183727, 4454444283100317, 29200642258872509, 191573834606253212
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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 59 (see link above)
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EXAMPLE
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Some solutions for n=2
..3..0..0..3....2..1..0..2....2..0..0..1....0..1..0..2....1..1..0..0
..2..1..2..0....1..2..1..3....3..1..1..0....0..1..1..3....2..2..1..3
..1..2..3..3....2..1..2..1....3..2..2..3....0..1..1..2....2..3..2..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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