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A266427 Number of nX7 binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing. 0
8, 92, 1170, 16585, 251381, 3889553, 59155748, 861030491, 11809616668, 151566391972, 1816912772913, 20365495779036 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A266428.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A266428.

Sequence in context: A292842 A133271 A180903 * A239644 A099142 A007556

Adjacent sequences:  A266424 A266425 A266426 * A266428 A266429 A266430

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 29 2015

STATUS

approved

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Last modified December 3 23:53 EST 2020. Contains 338920 sequences. (Running on oeis4.)