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A266933 Number of nX6 binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing. 0
2, 6, 19, 82, 429, 2577, 15850, 96503, 555060, 2977370, 14782970, 68041108, 291292442, 1165800099, 4383605127, 15564591521, 52423001756, 168200350788, 516045791503, 1519124991181 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A266935.

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A266935.

Sequence in context: A287897 A349401 A344317 * A291106 A079453 A341639

Adjacent sequences:  A266930 A266931 A266932 * A266934 A266935 A266936

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 06 2016

STATUS

approved

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Last modified May 19 17:44 EDT 2022. Contains 353847 sequences. (Running on oeis4.)