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A266469
Number of nX7 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.
0
2, 9, 52, 463, 5371, 77320, 1231170, 20115063, 319006954, 4768598707, 66353854322, 856330630443, 10262183989448
OFFSET
1,1
COMMENTS
Column 7 of A266470.
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..0..0....0..0..0..1..1..1..1....0..0..0..0..0..0..0
..0..0..0..0..0..0..0....0..1..1..0..0..0..0....0..0..0..0..0..0..1
..0..0..0..0..0..0..1....1..0..0..1..1..1..1....0..0..0..1..1..1..0
..1..1..1..1..1..1..0....1..1..1..0..0..0..0....1..1..1..0..0..0..0
CROSSREFS
Cf. A266470.
Sequence in context: A360193 A347774 A360718 * A371226 A367390 A080146
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 29 2015
STATUS
approved