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A266940
Number of 7Xn binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.
0
8, 42, 182, 794, 3566, 15850, 68890, 288333, 1155281, 4410923, 16029008, 55677559, 184683538, 588011958
OFFSET
1,1
COMMENTS
Row 7 of A266935.
EXAMPLE
Some solutions for n=4
..0..0..1..1....0..0..0..0....0..0..0..1....0..0..0..0....0..0..0..0
..0..0..1..1....0..0..0..1....0..0..1..0....0..0..1..1....0..0..1..1
..1..1..0..0....0..0..0..1....0..1..0..0....1..1..0..0....0..0..1..1
..1..1..0..0....0..0..1..0....1..0..1..0....1..1..0..0....1..1..0..0
..1..1..0..1....0..1..0..0....1..0..1..0....1..1..0..0....1..1..0..0
..1..1..1..0....1..0..1..0....1..1..0..0....1..1..0..0....1..1..0..1
..1..1..1..1....1..1..0..0....1..1..0..1....1..1..1..1....1..1..1..0
CROSSREFS
Cf. A266935.
Sequence in context: A119965 A229729 A055082 * A212337 A289031 A093381
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 06 2016
STATUS
approved