A203670 Number of (n+1)X7 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

67221763, 16256618529, 2567705516301, 248951034536521, 16249513382398064, 762808281322416881, 27330475005789023048, 778241788065663598911

Offset

1,1

Comments

Column 6 of A203672

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A011576 A089081 A161774 * A353203 A183707 A256274

Adjacent sequences: A203667 A203668 A203669 * A203671 A203672 A203673

Keyword

nonn

Author

R. H. Hardin Jan 04 2012

Status

approved