A202558 Number of nX6 0,1 arrays with the row and column sums nondecreasing

7, 151, 2848, 57255, 1126437, 22360610, 436020774, 8531393529, 165372103634, 3209822188135, 61997477071836, 1199480307020988, 23143113343639189, 447443373807337136, 8639247851127637315

Offset

1,1

Comments

Column 6 of A202560

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Sequence in context: A339582 A232446 A362491 * A159659 A100868 A171410

Adjacent sequences: A202555 A202556 A202557 * A202559 A202560 A202561

Keyword

nonn

Author

R. H. Hardin Dec 21 2011

Status

approved