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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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A266935.
LINKS
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

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Last modified March 29 09:44 EDT 2024. Contains 371268 sequences. (Running on oeis4.)