A202559 Number of nX7 0,1 arrays with the row and column sums nondecreasing

8, 293, 9520, 342295, 12176148, 436020774, 15635171834, 557315843073, 19890838348436, 707996212911950, 25194289287709052

Offset

1,1

Comments

Column 7 of A202560

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A065141 A190840 A000842 * A232372 A264248 A326013

Adjacent sequences: A202556 A202557 A202558 * A202560 A202561 A202562

Keyword

nonn

Author

R. H. Hardin Dec 21 2011

Status

approved