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A266426 Number of nX6 binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing. 0
7, 63, 574, 5365, 49894, 448649, 3825307, 30555624, 227542455, 1579153474, 10236107278, 62184207773, 355425984636, 1918894455423, 9822580592133, 47841257692021, 222427734697477, 990076818618586 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A266428.

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A266428.

Sequence in context: A291034 A155132 A270472 * A233743 A015684 A051579

Adjacent sequences:  A266423 A266424 A266425 * A266427 A266428 A266429

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 29 2015

STATUS

approved

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Last modified December 4 02:18 EST 2020. Contains 338921 sequences. (Running on oeis4.)