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A266929
Number of n X n binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.
0
2, 4, 9, 35, 210, 2577, 68890, 4605960, 821453747
OFFSET
1,1
COMMENTS
Diagonal of A266935.
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..0..1....0..0..1..1....0..0..0..1....0..0..1..1
..0..0..1..0....1..1..1..0....1..1..0..0....0..0..1..1....0..0..1..1
..1..1..0..1....1..1..1..0....1..1..1..1....1..1..0..0....1..1..0..0
..1..1..1..0....1..1..1..1....1..1..1..1....1..1..1..0....1..1..0..0
CROSSREFS
Cf. A266935.
Sequence in context: A054119 A259490 A274758 * A242986 A327057 A151891
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 06 2016
STATUS
approved