A250680 Number of (4+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.

11736, 210158, 3107446, 41503790, 505108522, 5726252240, 61498698426, 632850763138, 6297768773474, 61000028098516, 578059653008102, 5380105017634102, 49331581021446126, 446710039295094002

Offset: 1

Author

R. H. Hardin, Nov 26 2014

Keywords

• nonn

Comments

Row 4 of A250676

Examples

			Some solutions for n=1
..2..0....2..1....1..2....3..0....2..0....0..2....1..2....0..2....1..1....0..3
..0..2....3..0....3..0....3..0....2..1....0..2....3..0....2..0....2..0....1..2
..2..0....3..0....1..2....3..0....2..2....0..2....1..2....2..1....2..2....1..2
..1..3....3..0....2..1....2..1....2..3....0..2....2..1....2..1....1..3....2..1
..3..1....3..0....3..0....1..3....3..2....1..1....2..3....2..2....2..2....0..3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210