A223624 Number of nX6 0..1 arrays with row sums nondecreasing and column sums unimodal

22, 643, 15778, 371569, 8313608, 180713080, 3825884676, 79714938310, 1637218009622, 33311576729949, 672361927867110

Offset

1,1

Comments

Column 6 of A223625

Links

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

Example

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

Crossrefs

Sequence in context: A373723 A369142 A218478 * A230836 A137262 A300137

Adjacent sequences: A223621 A223622 A223623 * A223625 A223626 A223627

Keyword

nonn

Author

R. H. Hardin Mar 24 2013

Status

approved