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A266426
Number of nX6 binary arrays with rows and columns lexicographically nondecreasing and column sums nondecreasing.
0
7, 63, 574, 5365, 49894, 448649, 3825307, 30555624, 227542455, 1579153474, 10236107278, 62184207773, 355425984636, 1918894455423, 9822580592133, 47841257692021, 222427734697477, 990076818618586
OFFSET
1,1
COMMENTS
Column 6 of A266428.
EXAMPLE
Some solutions for n=4
..0..0..0..1..1..1....0..0..0..0..0..0....0..0..1..1..1..1....0..0..0..0..0..1
..1..1..1..0..0..0....0..0..0..1..1..1....0..0..1..1..1..1....0..0..0..1..1..1
..1..1..1..1..1..1....0..0..0..1..1..1....1..1..0..0..0..1....0..1..1..1..1..1
..1..1..1..1..1..1....0..0..1..0..0..0....1..1..0..1..1..1....1..1..1..0..1..0
CROSSREFS
Cf. A266428.
Sequence in context: A291034 A155132 A270472 * A368164 A345078 A233743
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 29 2015
STATUS
approved