A250652 Number of (n+1)X(n+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

9, 34, 109, 316, 859, 2234, 5625, 13816, 33271, 78838, 184309, 425972, 974835, 2211826, 4980721, 11141104, 24772591, 54788078, 120586221, 264241132, 576716779, 1254096874, 2717908969, 5872025576, 12650020839, 27179089894

Offset: 1

Author

R. H. Hardin, Nov 26 2014

Keywords

• nonn

Comments

Diagonal of A250656

Examples

			Some solutions for n=4
..0..0..0..0..0....1..1..0..0..0....1..1..1..1..0....1..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..0....0..1..1..1..1....0..0..0..0..0....1..1..1..1..1
..0..0..0..0..0....0..1..1..1..1....0..0..0..0..0....0..0..1..1..1
..0..0..1..1..1....0..1..1..1..1....0..1..1..1..1....0..0..1..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..69