A223630 Number of 6Xn 0..1 arrays with row sums nondecreasing and column sums unimodal

7, 247, 7504, 228401, 6555965, 180713080, 4777458798, 122344224851, 3041708958520, 73824736436005, 1754118644947248, 40935403480469124, 940380376523871886

Offset

1,1

Comments

Row 6 of A223625

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Sequence in context: A086214 A133589 A296377 * A203158 A227414 A203698

Adjacent sequences: A223627 A223628 A223629 * A223631 A223632 A223633

Keyword

nonn

Author

R. H. Hardin Mar 24 2013

Status

approved