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A250668
Number of (n+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.
0
104, 5154, 388916, 41503790, 5803025694, 1009432228498, 210335029800118
OFFSET
1,1
COMMENTS
Diagonal of A250676.
EXAMPLE
Some solutions for n=2
..1..1..1....1..2..0....2..2..1....0..2..0....3..0..3....1..0..0....1..0..2
..2..2..2....1..2..3....2..3..3....0..2..1....1..3..0....2..2..2....0..1..3
..2..2..2....1..2..3....2..3..3....1..1..3....3..1..3....2..2..2....2..3..1
CROSSREFS
Cf. A250676.
Sequence in context: A299333 A007267 A300174 * A035811 A004393 A286329
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 26 2014
STATUS
approved