A223629 Number of 5Xn 0..1 arrays with row sums nondecreasing and column sums unimodal

6, 120, 2114, 35413, 557432, 8313608, 119085643, 1641434223, 21968751393, 286602316306, 3658119581129, 45840023294595, 565061162009598, 6868648590255302, 82463672861242529, 979223612521821703

Offset

1,1

Comments

Row 5 of A223625

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Sequence in context: A350712 A378780 A026337 * A065888 A246191 A246611

Adjacent sequences: A223626 A223627 A223628 * A223630 A223631 A223632

Keyword

nonn

Author

R. H. Hardin Mar 24 2013

Status

approved