A203664 Number of (n+1)X(n+1) 0..6 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively

728, 317138, 258487684, 314604157273, 469214921553966, 762808281322416881

Offset

1,1

Comments

Diagonal of A203672

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=4
..2..4..0..6..5....3..2..5..1..4....3..0..2..6..4....6..6..6..6..6
..4..2..6..5..6....0..5..2..6..3....1..4..4..4..6....6..6..6..6..6
..0..6..5..6..6....2..3..6..3..6....3..6..6..6..6....6..6..6..6..6
..5..5..6..6..6....0..6..3..6..3....6..6..6..6..6....6..6..6..6..6
..6..6..6..6..6....4..3..6..3..6....6..6..6..6..6....6..6..6..6..6

Crossrefs

Sequence in context: A203913 A203909 A085479 * A265103 A050790 A278609

Adjacent sequences: A203661 A203662 A203663 * A203665 A203666 A203667

Keyword

nonn

Author

R. H. Hardin Jan 04 2012

Status

approved