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A266545 Number of nX6 binary arrays with rows and columns lexicographically nondecreasing and row and column sums nonincreasing. 0
2, 5, 11, 27, 58, 176, 366, 1062, 2571, 7345, 17540, 47970, 109375, 272134, 595031, 1359839, 2827311, 6072251, 12027150, 24388681, 46416427, 89575530, 164016985, 303788687, 537614351, 959313275, 1647205384 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A266547.

LINKS

Table of n, a(n) for n=1..27.

EXAMPLE

Some solutions for n=6

..0..0..0..1..1..1....0..0..0..1..1..1....0..0..0..1..1..1....0..0..0..1..1..1

..0..1..1..0..0..0....0..1..1..0..0..1....0..0..1..0..1..1....0..0..1..0..1..1

..1..0..0..0..0..0....1..0..0..1..1..0....0..1..1..0..0..0....0..1..1..0..0..1

..1..0..0..0..0..0....1..1..1..0..0..0....1..0..0..1..0..0....1..0..1..0..1..0

..1..0..0..0..0..0....1..1..1..0..0..0....1..1..0..0..0..0....1..1..0..1..0..0

..1..0..0..0..0..0....1..1..1..0..0..0....1..1..0..0..0..0....1..1..0..1..0..0

CROSSREFS

Cf. A266547.

Sequence in context: A182580 A067922 A212567 * A095975 A006652 A238825

Adjacent sequences:  A266542 A266543 A266544 * A266546 A266547 A266548

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2015

STATUS

approved

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Last modified September 15 18:22 EDT 2019. Contains 327082 sequences. (Running on oeis4.)