A250805 Number of (n+1)X(n+1) 0..2 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.

36, 379, 3081, 20631, 120304, 634509, 3104985, 14345803, 63351756, 269772537, 1114996177, 4494912111, 17741279760, 68762781541, 262334037201, 987009622419, 3668074098940, 13482629809713, 49069419165081, 176992814380663

Offset: 1

Author

R. H. Hardin, Nov 27 2014

Keywords

• nonn

Comments

Diagonal of A250812

Examples

			Some solutions for n=4
..2..2..2..2..0....1..1..1..1..1....2..1..1..1..1....2..2..1..1..1
..0..0..0..0..0....2..2..2..2..2....0..0..0..0..1....0..0..0..0..0
..2..2..2..2..2....1..1..2..2..2....0..1..1..1..2....0..1..1..1..1
..1..1..1..1..2....0..0..1..2..2....0..1..1..1..2....0..1..1..1..1
..0..0..1..1..2....0..0..1..2..2....0..1..1..1..2....0..1..2..2..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..47